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[4].limit = 3;
 150                 priv->tx_stats[5].limit = 4;
 151                 priv->tx_stats[6].limit = 3;
 152                 priv->tx_stats[7].limit = 1;
 153                 dev->queues = 4;
 154         }
 155 }
 156 EXPORT_SYMBOL_GPL(p54_parse_firmware);
 157
 158 static int p54_convert_rev0(struct ieee80211_hw *dev,
 159                             struct pda_pa_curve_data *curve_data)
 160 {
 161         struct p54_common *priv = dev->priv;
 162         struct p54_pa_curve_data_sample *dst;
 163         struct pda_pa_curve_data_sample_rev0 *src;
 164         size_t cd_len = sizeof(*curve_data) +
 165                 (curve_data->points_per_channel*sizeof(*dst) + 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                         dst = target;
 184                         src = source;
 185
 186                         dst->rf_power = src->rf_power;
 187                         dst->pa_detector = src->pa_detector;
 188                         dst->data_64qam = src->pcv;
 189                         /* "invent" the points for the other modulations */
 190 #define SUB(x,y) (u8)((x) - (y)) > (x) ? 0 : (x) - (y)
 191                         dst->data_16qam = SUB(src->pcv, 12);
 192                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 193                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 194                         dst->data_barker = SUB(dst->data_bpsk, 14);
 195 #undef SUB
 196                         target += sizeof(*dst);
 197                         source += sizeof(*src);
 198                 }
 199         }
 200
 201         return 0;
 202 }
 203
 204 static int p54_convert_rev1(struct ieee80211_hw *dev,
 205                             struct pda_pa_curve_data *curve_data)
 206 {
 207         struct p54_common *priv = dev->priv;
 208         struct p54_pa_curve_data_sample *dst;
 209         struct pda_pa_curve_data_sample_rev1 *src;
 210         size_t cd_len = sizeof(*curve_data) +
 211                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 212                  curve_data->channels;
 213         unsigned int i, j;
 214         void *source, *target;
 215
 216         priv->curve_data = kmalloc(cd_len, GFP_KERNEL);
 217         if (!priv->curve_data)
 218                 return -ENOMEM;
 219
 220         memcpy(priv->curve_data, curve_data, sizeof(*curve_data));
 221         source = curve_data->data;
 222         target = priv->curve_data->data;
 223         for (i = 0; i < curve_data->channels; i++) {
 224                 __le16 *freq = source;
 225                 source += sizeof(__le16);
 226                 *((__le16 *)target) = *freq;
 227                 target += sizeof(__le16);
 228                 for (j = 0; j < curve_data->points_per_channel; j++) {
 229                         memcpy(target, source, sizeof(*src));
 230
 231                         target += sizeof(*dst);
 232                         source += sizeof(*src);
 233                 }
 234                 source++;
 235         }
 236
 237         return 0;
 238 }
 239
 240 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 241 {
 242         struct p54_common *priv = dev->priv;
 243         struct eeprom_pda_wrap *wrap = NULL;
 244         struct pda_entry *entry;
 245         unsigned int data_len, entry_len;
 246         void *tmp;
 247         int err;
 248         u8 *end = (u8 *)eeprom + len;
 249
 250         wrap = (struct eeprom_pda_wrap *) eeprom;
 251         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 252
 253         /* verify that at least the entry length/code fits */
 254         while ((u8 *)entry <= end - sizeof(*entry)) {
 255                 entry_len = le16_to_cpu(entry->len);
 256                 data_len = ((entry_len - 1) << 1);
 257
 258                 /* abort if entry exceeds whole structure */
 259                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 260                         break;
 261
 262                 switch (le16_to_cpu(entry->code)) {
 263                 case PDR_MAC_ADDRESS:
 264                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 265                         break;
 266                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 267                         if (data_len < 2) {
 268                                 err = -EINVAL;
 269                                 goto err;
 270                         }
 271
 272                         if (2 + entry->data[1]*sizeof(*priv->output_limit) > data_len) {
 273                                 err = -EINVAL;
 274                                 goto err;
 275                         }
 276
 277                         priv->output_limit = kmalloc(entry->data[1] *
 278                                 sizeof(*priv->output_limit), GFP_KERNEL);
 279
 280                         if (!priv->output_limit) {
 281                                 err = -ENOMEM;
 282                                 goto err;
 283                         }
 284
 285                         memcpy(priv->output_limit, &entry->data[2],
 286                                entry->data[1]*sizeof(*priv->output_limit));
 287                         priv->output_limit_len = entry->data[1];
 288                         break;
 289                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 290                         struct pda_pa_curve_data *curve_data =
 291                                 (struct pda_pa_curve_data *)entry->data;
 292                         if (data_len < sizeof(*curve_data)) {
 293                                 err = -EINVAL;
 294                                 goto err;
 295                         }
 296
 297                         switch (curve_data->cal_method_rev) {
 298                         case 0:
 299                                 err = p54_convert_rev0(dev, curve_data);
 300                                 break;
 301                         case 1:
 302                                 err = p54_convert_rev1(dev, curve_data);
 303                                 break;
 304                         default:
 305                                 printk(KERN_ERR "p54: unknown curve data "
 306                                                 "revision %d\n",
 307                                                 curve_data->cal_method_rev);
 308                                 err = -ENODEV;
 309                                 break;
 310                         }
 311                         if (err)
 312                                 goto err;
 313
 314                 }
 315                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 316                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 317                         if (!priv->iq_autocal) {
 318                                 err = -ENOMEM;
 319                                 goto err;
 320                         }
 321
 322                         memcpy(priv->iq_autocal, entry->data, data_len);
 323                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 324                         break;
 325                 case PDR_INTERFACE_LIST:
 326                         tmp = entry->data;
 327                         while ((u8 *)tmp < entry->data + data_len) {
 328                                 struct bootrec_exp_if *exp_if = tmp;
 329                                 if (le16_to_cpu(exp_if->if_id) == 0xF)
 330                                         priv->rxhw = exp_if->variant & cpu_to_le16(0x07);
 331                                 tmp += sizeof(struct bootrec_exp_if);
 332                         }
 333                         break;
 334                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 335                         priv->version = *(u8 *)(entry->data + 1);
 336                         break;
 337                 case PDR_END:
 338                         /* make it overrun */
 339                         entry_len = len;
 340                         break;
 341                 default:
 342                         printk(KERN_INFO "p54: unknown eeprom code : 0x%x\n",
 343                                 le16_to_cpu(entry->code));
 344                         break;
 345                 }
 346
 347                 entry = (void *)entry + (entry_len + 1)*2;
 348         }
 349
 350         if (!priv->iq_autocal || !priv->output_limit || !priv->curve_data) {
 351                 printk(KERN_ERR "p54: not all required entries found in eeprom!\n");
 352                 err = -EINVAL;
 353                 goto err;
 354         }
 355
 356         return 0;
 357
 358   err:
 359         if (priv->iq_autocal) {
 360                 kfree(priv->iq_autocal);
 361                 priv->iq_autocal = NULL;
 362         }
 363
 364         if (priv->output_limit) {
 365                 kfree(priv->output_limit);
 366                 priv->output_limit = NULL;
 367         }
 368
 369         if (priv->curve_data) {
 370                 kfree(priv->curve_data);
 371                 priv->curve_data = NULL;
 372         }
 373
 374         printk(KERN_ERR "p54: eeprom parse failed!\n");
 375         return err;
 376 }
 377 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 378
 379 void p54_fill_eeprom_readback(struct p54_control_hdr *hdr)
 380 {
 381         struct p54_eeprom_lm86 *eeprom_hdr;
 382
 383         hdr->magic1 = cpu_to_le16(0x8000);
 384         hdr->len = cpu_to_le16(sizeof(*eeprom_hdr) + 0x2000);
 385         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_EEPROM_READBACK);
 386         hdr->retry1 = hdr->retry2 = 0;
 387         eeprom_hdr = (struct p54_eeprom_lm86 *) hdr->data;
 388         eeprom_hdr->offset = 0x0;
 389         eeprom_hdr->len = cpu_to_le16(0x2000);
 390 }
 391 EXPORT_SYMBOL_GPL(p54_fill_eeprom_readback);
 392
 393 static void p54_rx_data(struct ieee80211_hw *dev, struct sk_buff *skb)
 394 {
 395         struct p54_rx_hdr *hdr = (struct p54_rx_hdr *) skb->data;
 396         struct ieee80211_rx_status rx_status = {0};
 397         u16 freq = le16_to_cpu(hdr->freq);
 398
 399         rx_status.signal = hdr->rssi;
 400         /* XX correct? */
 401         rx_status.qual = (100 * hdr->rssi) / 127;
 402         rx_status.rate_idx = hdr->rate & 0xf;
 403         rx_status.freq = freq;
 404         rx_status.band = IEEE80211_BAND_2GHZ;
 405         rx_status.antenna = hdr->antenna;
 406         rx_status.mactime = le64_to_cpu(hdr->timestamp);
 407         rx_status.flag |= RX_FLAG_TSFT;
 408
 409         skb_pull(skb, sizeof(*hdr));
 410         skb_trim(skb, le16_to_cpu(hdr->len));
 411
 412         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 413 }
 414
 415 static void inline p54_wake_free_queues(struct ieee80211_hw *dev)
 416 {
 417         struct p54_common *priv = dev->priv;
 418         int i;
 419
 420         for (i = 0; i < dev->queues; i++)
 421                 if (priv->tx_stats[i + 4].len < priv->tx_stats[i + 4].limit)
 422                         ieee80211_wake_queue(dev, i);
 423 }
 424
 425 static void p54_rx_frame_sent(struct ieee80211_hw *dev, struct sk_buff *skb)
 426 {
 427         struct p54_common *priv = dev->priv;
 428         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 429         struct p54_frame_sent_hdr *payload = (struct p54_frame_sent_hdr *) hdr->data;
 430         struct sk_buff *entry = (struct sk_buff *) priv->tx_queue.next;
 431         u32 addr = le32_to_cpu(hdr->req_id) - 0x70;
 432         struct memrecord *range = NULL;
 433         u32 freed = 0;
 434         u32 last_addr = priv->rx_start;
 435         unsigned long flags;
 436
 437         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 438         while (entry != (struct sk_buff *)&priv->tx_queue) {
 439                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 440                 range = (void *)info->driver_data;
 441                 if (range->start_addr == addr) {
 442                         struct p54_control_hdr *entry_hdr;
 443                         struct p54_tx_control_allocdata *entry_data;
 444                         int pad = 0;
 445
 446                         if (entry->next != (struct sk_buff *)&priv->tx_queue) {
 447                                 struct ieee80211_tx_info *ni;
 448                                 struct memrecord *mr;
 449
 450                                 ni = IEEE80211_SKB_CB(entry->next);
 451                                 mr = (struct memrecord *)ni->driver_data;
 452                                 freed = mr->start_addr - last_addr;
 453                         } else
 454                                 freed = priv->rx_end - last_addr;
 455
 456                         last_addr = range->end_addr;
 457                         __skb_unlink(entry, &priv->tx_queue);
 458                         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 459
 460                         memset(&info->status, 0, sizeof(info->status));
 461                         entry_hdr = (struct p54_control_hdr *) entry->data;
 462                         entry_data = (struct p54_tx_control_allocdata *) entry_hdr->data;
 463                         if ((entry_hdr->magic1 & cpu_to_le16(0x4000)) != 0)
 464                                 pad = entry_data->align[0];
 465
 466                         priv->tx_stats[entry_data->hw_queue].len--;
 467                         if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
 468                                 if (!(payload->status & 0x01))
 469                                         info->flags |= IEEE80211_TX_STAT_ACK;
 470                                 else
 471                                         info->status.excessive_retries = 1;
 472                         }
 473                         info->status.retry_count = payload->retries - 1;
 474                         info->status.ack_signal = le16_to_cpu(payload->ack_rssi);
 475                         skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
 476                         ieee80211_tx_status_irqsafe(dev, entry);
 477                         goto out;
 478                 } else
 479                         last_addr = range->end_addr;
 480                 entry = entry->next;
 481         }
 482         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 483
 484 out:
 485         if (freed >= IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 486             sizeof(struct p54_control_hdr))
 487                 p54_wake_free_queues(dev);
 488 }
 489
 490 static void p54_rx_control(struct ieee80211_hw *dev, struct sk_buff *skb)
 491 {
 492         struct p54_control_hdr *hdr = (struct p54_control_hdr *) skb->data;
 493
 494         switch (le16_to_cpu(hdr->type)) {
 495         case P54_CONTROL_TYPE_TXDONE:
 496                 p54_rx_frame_sent(dev, skb);
 497                 break;
 498         case P54_CONTROL_TYPE_BBP:
 499                 break;
 500         default:
 501                 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
 502                        wiphy_name(dev->wiphy), le16_to_cpu(hdr->type));
 503                 break;
 504         }
 505 }
 506
 507 /* returns zero if skb can be reused */
 508 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
 509 {
 510         u8 type = le16_to_cpu(*((__le16 *)skb->data)) >> 8;
 511         switch (type) {
 512         case 0x00:
 513         case 0x01:
 514                 p54_rx_data(dev, skb);
 515                 return -1;
 516         case 0x4d:
 517                 /* TODO: do something better... but then again, I've never seen this happen */
 518                 printk(KERN_ERR "%s: Received fault. Probably need to restart hardware now..\n",
 519                        wiphy_name(dev->wiphy));
 520                 break;
 521         case 0x80:
 522                 p54_rx_control(dev, skb);
 523                 break;
 524         default:
 525                 printk(KERN_ERR "%s: unknown frame RXed (0x%02x)\n",
 526                        wiphy_name(dev->wiphy), type);
 527                 break;
 528         }
 529         return 0;
 530 }
 531 EXPORT_SYMBOL_GPL(p54_rx);
 532
 533 /*
 534  * So, the firmware is somewhat stupid and doesn't know what places in its
 535  * memory incoming data should go to. By poking around in the firmware, we
 536  * can find some unused memory to upload our packets to. However, data that we
 537  * want the card to TX needs to stay intact until the card has told us that
 538  * it is done with it. This function finds empty places we can upload to and
 539  * marks allocated areas as reserved if necessary. p54_rx_frame_sent frees
 540  * allocated areas.
 541  */
 542 static void p54_assign_address(struct ieee80211_hw *dev, struct sk_buff *skb,
 543                                struct p54_control_hdr *data, u32 len)
 544 {
 545         struct p54_common *priv = dev->priv;
 546         struct sk_buff *entry = priv->tx_queue.next;
 547         struct sk_buff *target_skb = NULL;
 548         u32 last_addr = priv->rx_start;
 549         u32 largest_hole = 0;
 550         u32 target_addr = priv->rx_start;
 551         unsigned long flags;
 552         unsigned int left;
 553         len = (len + 0x170 + 3) & ~0x3; /* 0x70 headroom, 0x100 tailroom */
 554
 555         spin_lock_irqsave(&priv->tx_queue.lock, flags);
 556         left = skb_queue_len(&priv->tx_queue);
 557         while (left--) {
 558                 u32 hole_size;
 559                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(entry);
 560                 struct memrecord *range = (void *)info->driver_data;
 561                 hole_size = range->start_addr - last_addr;
 562                 if (!target_skb && hole_size >= len) {
 563                         target_skb = entry->prev;
 564                         hole_size -= len;
 565                         target_addr = last_addr;
 566                 }
 567                 largest_hole = max(largest_hole, hole_size);
 568                 last_addr = range->end_addr;
 569                 entry = entry->next;
 570         }
 571         if (!target_skb && priv->rx_end - last_addr >= len) {
 572                 target_skb = priv->tx_queue.prev;
 573                 largest_hole = max(largest_hole, priv->rx_end - last_addr - len);
 574                 if (!skb_queue_empty(&priv->tx_queue)) {
 575                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(target_skb);
 576                         struct memrecord *range = (void *)info->driver_data;
 577                         target_addr = range->end_addr;
 578                 }
 579         } else
 580                 largest_hole = max(largest_hole, priv->rx_end - last_addr);
 581
 582         if (skb) {
 583                 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 584                 struct memrecord *range = (void *)info->driver_data;
 585                 range->start_addr = target_addr;
 586                 range->end_addr = target_addr + len;
 587                 __skb_queue_after(&priv->tx_queue, target_skb, skb);
 588                 if (largest_hole < IEEE80211_MAX_RTS_THRESHOLD + 0x170 +
 589                                    sizeof(struct p54_control_hdr))
 590                         ieee80211_stop_queues(dev);
 591         }
 592         spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
 593
 594         data->req_id = cpu_to_le32(target_addr + 0x70);
 595 }
 596
 597 static int p54_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 598 {
 599         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 600         struct ieee80211_tx_queue_stats *current_queue;
 601         struct p54_common *priv = dev->priv;
 602         struct p54_control_hdr *hdr;
 603         struct ieee80211_hdr *ieee80211hdr = (struct ieee80211_hdr *)skb->data;
 604         struct p54_tx_control_allocdata *txhdr;
 605         size_t padding, len;
 606         u8 rate;
 607         u8 cts_rate = 0x20;
 608
 609         current_queue = &priv->tx_stats[skb_get_queue_mapping(skb) + 4];
 610         if (unlikely(current_queue->len > current_queue->limit))
 611                 return NETDEV_TX_BUSY;
 612         current_queue->len++;
 613         current_queue->count++;
 614         if (current_queue->len == current_queue->limit)
 615                 ieee80211_stop_queue(dev, skb_get_queue_mapping(skb));
 616
 617         padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
 618         len = skb->len;
 619
 620         txhdr = (struct p54_tx_control_allocdata *)
 621                         skb_push(skb, sizeof(*txhdr) + padding);
 622         hdr = (struct p54_control_hdr *) skb_push(skb, sizeof(*hdr));
 623
 624         if (padding)
 625                 hdr->magic1 = cpu_to_le16(0x4010);
 626         else
 627                 hdr->magic1 = cpu_to_le16(0x0010);
 628         hdr->len = cpu_to_le16(len);
 629         hdr->type = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? 0 : cpu_to_le16(1);
 630         hdr->retry1 = hdr->retry2 = info->control.retry_limit;
 631
 632         /* TODO: add support for alternate retry TX rates */
 633         rate = ieee80211_get_tx_rate(dev, info)->hw_value;
 634         if (info->flags & IEEE80211_TX_CTL_SHORT_PREAMBLE) {
 635                 rate |= 0x10;
 636                 cts_rate |= 0x10;
 637         }
 638         if (info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
 639                 rate |= 0x40;
 640                 cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 641         } else if (info->flags & IEEE80211_TX_CTL_USE_CTS_PROTECT) {
 642                 rate |= 0x20;
 643                 cts_rate |= ieee80211_get_rts_cts_rate(dev, info)->hw_value;
 644         }
 645         memset(txhdr->rateset, rate, 8);
 646         txhdr->key_type = 0;
 647         txhdr->key_len = 0;
 648         txhdr->hw_queue = skb_get_queue_mapping(skb) + 4;
 649         txhdr->tx_antenna = (info->antenna_sel_tx == 0) ?
 650                 2 : info->antenna_sel_tx - 1;
 651         txhdr->output_power = 0x7f; // HW Maximum
 652         txhdr->cts_rate = (info->flags & IEEE80211_TX_CTL_NO_ACK) ?
 653                           0 : cts_rate;
 654         if (padding)
 655                 txhdr->align[0] = padding;
 656
 657         /* FIXME: The sequence that follows is needed for this driver to
 658          * work with mac80211 since "mac80211: fix TX sequence numbers".
 659          * As with the temporary code in rt2x00, changes will be needed
 660          * to get proper sequence numbers on beacons. In addition, this
 661          * patch places the sequence number in the hardware state, which
 662          * limits us to a single virtual state.
 663          */
 664         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
 665                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
 666                         priv->seqno += 0x10;
 667                 ieee80211hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
 668                 ieee80211hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
 669         }
 670         /* modifies skb->cb and with it info, so must be last! */
 671         p54_assign_address(dev, skb, hdr, skb->len);
 672
 673         priv->tx(dev, hdr, skb->len, 0);
 674         return 0;
 675 }
 676
 677 static int p54_set_filter(struct ieee80211_hw *dev, u16 filter_type,
 678                           const u8 *dst, const u8 *src, u8 antenna,
 679                           u32 magic3, u32 magic8, u32 magic9)
 680 {
 681         struct p54_common *priv = dev->priv;
 682         struct p54_control_hdr *hdr;
 683         struct p54_tx_control_filter *filter;
 684
 685         hdr = kzalloc(sizeof(*hdr) + sizeof(*filter) +
 686                       priv->tx_hdr_len, GFP_ATOMIC);
 687         if (!hdr)
 688                 return -ENOMEM;
 689
 690         hdr = (void *)hdr + priv->tx_hdr_len;
 691
 692         filter = (struct p54_tx_control_filter *) hdr->data;
 693         hdr->magic1 = cpu_to_le16(0x8001);
 694         hdr->len = cpu_to_le16(sizeof(*filter));
 695         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*filter));
 696         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_FILTER_SET);
 697
 698         filter->filter_type = cpu_to_le16(filter_type);
 699         memcpy(filter->dst, dst, ETH_ALEN);
 700         if (!src)
 701                 memset(filter->src, ~0, ETH_ALEN);
 702         else
 703                 memcpy(filter->src, src, ETH_ALEN);
 704         filter->antenna = antenna;
 705         filter->magic3 = cpu_to_le32(magic3);
 706         filter->rx_addr = cpu_to_le32(priv->rx_end);
 707         filter->max_rx = cpu_to_le16(0x0620);   /* FIXME: for usb ver 1.. maybe */
 708         filter->rxhw = priv->rxhw;
 709         filter->magic8 = cpu_to_le16(magic8);
 710         filter->magic9 = cpu_to_le16(magic9);
 711
 712         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*filter), 1);
 713         return 0;
 714 }
 715
 716 static int p54_set_freq(struct ieee80211_hw *dev, __le16 freq)
 717 {
 718         struct p54_common *priv = dev->priv;
 719         struct p54_control_hdr *hdr;
 720         struct p54_tx_control_channel *chan;
 721         unsigned int i;
 722         void *entry;
 723
 724         hdr = kzalloc(sizeof(*hdr) + sizeof(*chan) +
 725                       priv->tx_hdr_len, GFP_KERNEL);
 726         if (!hdr)
 727                 return -ENOMEM;
 728
 729         hdr = (void *)hdr + priv->tx_hdr_len;
 730
 731         chan = (struct p54_tx_control_channel *) hdr->data;
 732
 733         hdr->magic1 = cpu_to_le16(0x8001);
 734         hdr->len = cpu_to_le16(sizeof(*chan));
 735         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_CHANNEL_CHANGE);
 736         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*chan));
 737
 738         chan->flags = cpu_to_le16(0x1);
 739         chan->dwell = cpu_to_le16(0x0);
 740
 741         for (i = 0; i < priv->iq_autocal_len; i++) {
 742                 if (priv->iq_autocal[i].freq != freq)
 743                         continue;
 744
 745                 memcpy(&chan->iq_autocal, &priv->iq_autocal[i],
 746                        sizeof(*priv->iq_autocal));
 747                 break;
 748         }
 749         if (i == priv->iq_autocal_len)
 750                 goto err;
 751
 752         for (i = 0; i < priv->output_limit_len; i++) {
 753                 if (priv->output_limit[i].freq != freq)
 754                         continue;
 755
 756                 chan->val_barker = 0x38;
 757                 chan->val_bpsk = chan->dup_bpsk =
 758                         priv->output_limit[i].val_bpsk;
 759                 chan->val_qpsk = chan->dup_qpsk =
 760                         priv->output_limit[i].val_qpsk;
 761                 chan->val_16qam = chan->dup_16qam =
 762                         priv->output_limit[i].val_16qam;
 763                 chan->val_64qam = chan->dup_64qam =
 764                         priv->output_limit[i].val_64qam;
 765                 break;
 766         }
 767         if (i == priv->output_limit_len)
 768                 goto err;
 769
 770         entry = priv->curve_data->data;
 771         for (i = 0; i < priv->curve_data->channels; i++) {
 772                 if (*((__le16 *)entry) != freq) {
 773                         entry += sizeof(__le16);
 774                         entry += sizeof(struct p54_pa_curve_data_sample) *
 775                                  priv->curve_data->points_per_channel;
 776                         continue;
 777                 }
 778
 779                 entry += sizeof(__le16);
 780                 chan->pa_points_per_curve =
 781                         min(priv->curve_data->points_per_channel, (u8) 8);
 782
 783                 memcpy(chan->curve_data, entry, sizeof(*chan->curve_data) *
 784                        chan->pa_points_per_curve);
 785                 break;
 786         }
 787
 788         chan->rssical_mul = cpu_to_le16(130);
 789         chan->rssical_add = cpu_to_le16(0xfe70);        /* -400 */
 790
 791         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*chan), 1);
 792         return 0;
 793
 794  err:
 795         printk(KERN_ERR "%s: frequency change failed\n", wiphy_name(dev->wiphy));
 796         kfree(hdr);
 797         return -EINVAL;
 798 }
 799
 800 static int p54_set_leds(struct ieee80211_hw *dev, int mode, int link, int act)
 801 {
 802         struct p54_common *priv = dev->priv;
 803         struct p54_control_hdr *hdr;
 804         struct p54_tx_control_led *led;
 805
 806         hdr = kzalloc(sizeof(*hdr) + sizeof(*led) +
 807                       priv->tx_hdr_len, GFP_KERNEL);
 808         if (!hdr)
 809                 return -ENOMEM;
 810
 811         hdr = (void *)hdr + priv->tx_hdr_len;
 812         hdr->magic1 = cpu_to_le16(0x8001);
 813         hdr->len = cpu_to_le16(sizeof(*led));
 814         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_LED);
 815         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*led));
 816
 817         led = (struct p54_tx_control_led *) hdr->data;
 818         led->mode = cpu_to_le16(mode);
 819         led->led_permanent = cpu_to_le16(link);
 820         led->led_temporary = cpu_to_le16(act);
 821         led->duration = cpu_to_le16(1000);
 822
 823         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*led), 1);
 824
 825         return 0;
 826 }
 827
 828 #define P54_SET_QUEUE(queue, ai_fs, cw_min, cw_max, _txop)      \
 829 do {                                                            \
 830         queue.aifs = cpu_to_le16(ai_fs);                        \
 831         queue.cwmin = cpu_to_le16(cw_min);                      \
 832         queue.cwmax = cpu_to_le16(cw_max);                      \
 833         queue.txop = cpu_to_le16(_txop);                        \
 834 } while(0)
 835
 836 static void p54_init_vdcf(struct ieee80211_hw *dev)
 837 {
 838         struct p54_common *priv = dev->priv;
 839         struct p54_control_hdr *hdr;
 840         struct p54_tx_control_vdcf *vdcf;
 841
 842         /* all USB V1 adapters need a extra headroom */
 843         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 844         hdr->magic1 = cpu_to_le16(0x8001);
 845         hdr->len = cpu_to_le16(sizeof(*vdcf));
 846         hdr->type = cpu_to_le16(P54_CONTROL_TYPE_DCFINIT);
 847         hdr->req_id = cpu_to_le32(priv->rx_start);
 848
 849         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 850
 851         P54_SET_QUEUE(vdcf->queue[0], 0x0002, 0x0003, 0x0007, 47);
 852         P54_SET_QUEUE(vdcf->queue[1], 0x0002, 0x0007, 0x000f, 94);
 853         P54_SET_QUEUE(vdcf->queue[2], 0x0003, 0x000f, 0x03ff, 0);
 854         P54_SET_QUEUE(vdcf->queue[3], 0x0007, 0x000f, 0x03ff, 0);
 855 }
 856
 857 static void p54_set_vdcf(struct ieee80211_hw *dev)
 858 {
 859         struct p54_common *priv = dev->priv;
 860         struct p54_control_hdr *hdr;
 861         struct p54_tx_control_vdcf *vdcf;
 862
 863         hdr = (void *)priv->cached_vdcf + priv->tx_hdr_len;
 864
 865         p54_assign_address(dev, NULL, hdr, sizeof(*hdr) + sizeof(*vdcf));
 866
 867         vdcf = (struct p54_tx_control_vdcf *) hdr->data;
 868
 869         if (dev->conf.flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 870                 vdcf->slottime = 9;
 871                 vdcf->magic1 = 0x10;
 872                 vdcf->magic2 = 0x00;
 873         } else {
 874                 vdcf->slottime = 20;
 875                 vdcf->magic1 = 0x0a;
 876                 vdcf->magic2 = 0x06;
 877         }
 878
 879         /* (see prism54/isl_oid.h for further details) */
 880         vdcf->frameburst = cpu_to_le16(0);
 881
 882         priv->tx(dev, hdr, sizeof(*hdr) + sizeof(*vdcf), 0);
 883 }
 884
 885 static int p54_start(struct ieee80211_hw *dev)
 886 {
 887         struct p54_common *priv = dev->priv;
 888         int err;
 889
 890         if (!priv->cached_vdcf) {
 891                 priv->cached_vdcf = kzalloc(sizeof(struct p54_tx_control_vdcf)+
 892                         priv->tx_hdr_len + sizeof(struct p54_control_hdr),
 893                         GFP_KERNEL);
 894
 895                 if (!priv->cached_vdcf)
 896                         return -ENOMEM;
 897         }
 898
 899         err = priv->open(dev);
 900         if (!err)
 901                 priv->mode = IEEE80211_IF_TYPE_MNTR;
 902
 903         p54_init_vdcf(dev);
 904
 905         return err;
 906 }
 907
 908 static void p54_stop(struct ieee80211_hw *dev)
 909 {
 910         struct p54_common *priv = dev->priv;
 911         struct sk_buff *skb;
 912         while ((skb = skb_dequeue(&priv->tx_queue)))
 913                 kfree_skb(skb);
 914         priv->stop(dev);
 915         priv->mode = IEEE80211_IF_TYPE_INVALID;
 916 }
 917
 918 static int p54_add_interface(struct ieee80211_hw *dev,
 919                              struct ieee80211_if_init_conf *conf)
 920 {
 921         struct p54_common *priv = dev->priv;
 922
 923         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
 924                 return -EOPNOTSUPP;
 925
 926         switch (conf->type) {
 927         case IEEE80211_IF_TYPE_STA:
 928                 priv->mode = conf->type;
 929                 break;
 930         default:
 931                 return -EOPNOTSUPP;
 932         }
 933
 934         memcpy(priv->mac_addr, conf->mac_addr, ETH_ALEN);
 935
 936         p54_set_filter(dev, 0, priv->mac_addr, NULL, 0, 1, 0, 0xF642);
 937         p54_set_filter(dev, 0, priv->mac_addr, NULL, 1, 0, 0, 0xF642);
 938
 939         switch (conf->type) {
 940         case IEEE80211_IF_TYPE_STA:
 941                 p54_set_filter(dev, 1, priv->mac_addr, NULL, 0, 0x15F, 0x1F4, 0);
 942                 break;
 943         default:
 944                 BUG();  /* impossible */
 945                 break;
 946         }
 947
 948         p54_set_leds(dev, 1, 0, 0);
 949
 950         return 0;
 951 }
 952
 953 static void p54_remove_interface(struct ieee80211_hw *dev,
 954                                  struct ieee80211_if_init_conf *conf)
 955 {
 956         struct p54_common *priv = dev->priv;
 957         priv->mode = IEEE80211_IF_TYPE_MNTR;
 958         memset(priv->mac_addr, 0, ETH_ALEN);
 959         p54_set_filter(dev, 0, priv->mac_addr, NULL, 2, 0, 0, 0);
 960 }
 961
 962 static int p54_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 963 {
 964         int ret;
 965         struct p54_common *priv = dev->priv;
 966
 967         mutex_lock(&priv->conf_mutex);
 968         ret = p54_set_freq(dev, cpu_to_le16(conf->channel->center_freq));
 969         p54_set_vdcf(dev);
 970         mutex_unlock(&priv->conf_mutex);
 971         return ret;
 972 }
 973
 974 static int p54_config_interface(struct ieee80211_hw *dev,
 975                                 struct ieee80211_vif *vif,
 976                                 struct ieee80211_if_conf *conf)
 977 {
 978         struct p54_common *priv = dev->priv;
 979
 980         mutex_lock(&priv->conf_mutex);
 981         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 0, 1, 0, 0xF642);
 982         p54_set_filter(dev, 0, priv->mac_addr, conf->bssid, 2, 0, 0, 0);
 983         p54_set_leds(dev, 1, !is_multicast_ether_addr(conf->bssid), 0);
 984         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
 985         mutex_unlock(&priv->conf_mutex);
 986         return 0;
 987 }
 988
 989 static void p54_configure_filter(struct ieee80211_hw *dev,
 990                                  unsigned int changed_flags,
 991                                  unsigned int *total_flags,
 992                                  int mc_count, struct dev_mc_list *mclist)
 993 {
 994         struct p54_common *priv = dev->priv;
 995
 996         *total_flags &= FIF_BCN_PRBRESP_PROMISC;
 997
 998         if (changed_flags & FIF_BCN_PRBRESP_PROMISC) {
 999                 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1000                         p54_set_filter(dev, 0, priv->mac_addr,
1001                                        NULL, 2, 0, 0, 0);
1002                 else
1003                         p54_set_filter(dev, 0, priv->mac_addr,
1004                                        priv->bssid, 2, 0, 0, 0);
1005         }
1006 }
1007
1008 static int p54_conf_tx(struct ieee80211_hw *dev, u16 queue,
1009                        const struct ieee80211_tx_queue_params *params)
1010 {
1011         struct p54_common *priv = dev->priv;
1012         struct p54_tx_control_vdcf *vdcf;
1013
1014         vdcf = (struct p54_tx_control_vdcf *)(((struct p54_control_hdr *)
1015                 ((void *)priv->cached_vdcf + priv->tx_hdr_len))->data);
1016
1017         if ((params) && !(queue > 4)) {
1018                 P54_SET_QUEUE(vdcf->queue[queue], params->aifs,
1019                         params->cw_min, params->cw_max, params->txop);
1020         } else
1021                 return -EINVAL;
1022
1023         p54_set_vdcf(dev);
1024
1025         return 0;
1026 }
1027
1028 static int p54_get_stats(struct ieee80211_hw *dev,
1029                          struct ieee80211_low_level_stats *stats)
1030 {
1031         /* TODO */
1032         return 0;
1033 }
1034
1035 static int p54_get_tx_stats(struct ieee80211_hw *dev,
1036                             struct ieee80211_tx_queue_stats *stats)
1037 {
1038         struct p54_common *priv = dev->priv;
1039
1040         memcpy(stats, &priv->tx_stats[4], sizeof(stats[0]) * dev->queues);
1041
1042         return 0;
1043 }
1044
1045 static const struct ieee80211_ops p54_ops = {
1046         .tx                     = p54_tx,
1047         .start                  = p54_start,
1048         .stop                   = p54_stop,
1049         .add_interface          = p54_add_interface,
1050         .remove_interface       = p54_remove_interface,
1051         .config                 = p54_config,
1052         .config_interface       = p54_config_interface,
1053         .configure_filter       = p54_configure_filter,
1054         .conf_tx                = p54_conf_tx,
1055         .get_stats              = p54_get_stats,
1056         .get_tx_stats           = p54_get_tx_stats
1057 };
1058
1059 struct ieee80211_hw *p54_init_common(size_t priv_data_len)
1060 {
1061         struct ieee80211_hw *dev;
1062         struct p54_common *priv;
1063
1064         dev = ieee80211_alloc_hw(priv_data_len, &p54_ops);
1065         if (!dev)
1066                 return NULL;
1067
1068         priv = dev->priv;
1069         priv->mode = IEEE80211_IF_TYPE_INVALID;
1070         skb_queue_head_init(&priv->tx_queue);
1071         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
1072         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | /* not sure */
1073                      IEEE80211_HW_RX_INCLUDES_FCS |
1074                      IEEE80211_HW_SIGNAL_UNSPEC;
1075
1076         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1077
1078         dev->channel_change_time = 1000;        /* TODO: find actual value */
1079         dev->max_signal = 127;
1080
1081         priv->tx_stats[0].limit = 1;
1082         priv->tx_stats[1].limit = 1;
1083         priv->tx_stats[2].limit = 1;
1084         priv->tx_stats[3].limit = 1;
1085         priv->tx_stats[4].limit = 5;
1086         dev->queues = 1;
1087
1088         dev->extra_tx_headroom = sizeof(struct p54_control_hdr) + 4 +
1089                                  sizeof(struct p54_tx_control_allocdata);
1090
1091         mutex_init(&priv->conf_mutex);
1092
1093         return dev;
1094 }
1095 EXPORT_SYMBOL_GPL(p54_init_common);
1096
1097 void p54_free_common(struct ieee80211_hw *dev)
1098 {
1099         struct p54_common *priv = dev->priv;
1100         kfree(priv->iq_autocal);
1101         kfree(priv->output_limit);
1102         kfree(priv->curve_data);
1103         kfree(priv->cached_vdcf);
1104 }
1105 EXPORT_SYMBOL_GPL(p54_free_common);
1106
1107 static int __init p54_init(void)
1108 {
1109         return 0;
1110 }
1111
1112 static void __exit p54_exit(void)
1113 {
1114 }
1115
1116 module_init(p54_init);
1117 module_exit(p54_exit);