SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/wireless/p54/eeprom.c

   1 /*
   2  * EEPROM parser code for mac80211 Prism54 drivers
   3  *
   4  * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
   5  * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
   6  * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * Based on:
   9  * - the islsm (softmac prism54) driver, which is:
  10  *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
  11  * - stlc45xx driver
  12  *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #include <linux/init.h>
  20 #include <linux/firmware.h>
  21 #include <linux/etherdevice.h>
  22
  23 #include <net/mac80211.h>
  24
  25 #include "p54.h"
  26 #include "eeprom.h"
  27 #include "lmac.h"
  28
  29 static struct ieee80211_rate p54_bgrates[] = {
  30         { .bitrate = 10, .hw_value = 0, },
  31         { .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  32         { .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  33         { .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
  34         { .bitrate = 60, .hw_value = 4, },
  35         { .bitrate = 90, .hw_value = 5, },
  36         { .bitrate = 120, .hw_value = 6, },
  37         { .bitrate = 180, .hw_value = 7, },
  38         { .bitrate = 240, .hw_value = 8, },
  39         { .bitrate = 360, .hw_value = 9, },
  40         { .bitrate = 480, .hw_value = 10, },
  41         { .bitrate = 540, .hw_value = 11, },
  42 };
  43
  44 static struct ieee80211_channel p54_bgchannels[] = {
  45         { .center_freq = 2412, .hw_value = 1, },
  46         { .center_freq = 2417, .hw_value = 2, },
  47         { .center_freq = 2422, .hw_value = 3, },
  48         { .center_freq = 2427, .hw_value = 4, },
  49         { .center_freq = 2432, .hw_value = 5, },
  50         { .center_freq = 2437, .hw_value = 6, },
  51         { .center_freq = 2442, .hw_value = 7, },
  52         { .center_freq = 2447, .hw_value = 8, },
  53         { .center_freq = 2452, .hw_value = 9, },
  54         { .center_freq = 2457, .hw_value = 10, },
  55         { .center_freq = 2462, .hw_value = 11, },
  56         { .center_freq = 2467, .hw_value = 12, },
  57         { .center_freq = 2472, .hw_value = 13, },
  58         { .center_freq = 2484, .hw_value = 14, },
  59 };
  60
  61 static struct ieee80211_supported_band band_2GHz = {
  62         .channels = p54_bgchannels,
  63         .n_channels = ARRAY_SIZE(p54_bgchannels),
  64         .bitrates = p54_bgrates,
  65         .n_bitrates = ARRAY_SIZE(p54_bgrates),
  66 };
  67
  68 static struct ieee80211_rate p54_arates[] = {
  69         { .bitrate = 60, .hw_value = 4, },
  70         { .bitrate = 90, .hw_value = 5, },
  71         { .bitrate = 120, .hw_value = 6, },
  72         { .bitrate = 180, .hw_value = 7, },
  73         { .bitrate = 240, .hw_value = 8, },
  74         { .bitrate = 360, .hw_value = 9, },
  75         { .bitrate = 480, .hw_value = 10, },
  76         { .bitrate = 540, .hw_value = 11, },
  77 };
  78
  79 static struct ieee80211_channel p54_achannels[] = {
  80         { .center_freq = 4920 },
  81         { .center_freq = 4940 },
  82         { .center_freq = 4960 },
  83         { .center_freq = 4980 },
  84         { .center_freq = 5040 },
  85         { .center_freq = 5060 },
  86         { .center_freq = 5080 },
  87         { .center_freq = 5170 },
  88         { .center_freq = 5180 },
  89         { .center_freq = 5190 },
  90         { .center_freq = 5200 },
  91         { .center_freq = 5210 },
  92         { .center_freq = 5220 },
  93         { .center_freq = 5230 },
  94         { .center_freq = 5240 },
  95         { .center_freq = 5260 },
  96         { .center_freq = 5280 },
  97         { .center_freq = 5300 },
  98         { .center_freq = 5320 },
  99         { .center_freq = 5500 },
 100         { .center_freq = 5520 },
 101         { .center_freq = 5540 },
 102         { .center_freq = 5560 },
 103         { .center_freq = 5580 },
 104         { .center_freq = 5600 },
 105         { .center_freq = 5620 },
 106         { .center_freq = 5640 },
 107         { .center_freq = 5660 },
 108         { .center_freq = 5680 },
 109         { .center_freq = 5700 },
 110         { .center_freq = 5745 },
 111         { .center_freq = 5765 },
 112         { .center_freq = 5785 },
 113         { .center_freq = 5805 },
 114         { .center_freq = 5825 },
 115 };
 116
 117 static struct ieee80211_supported_band band_5GHz = {
 118         .channels = p54_achannels,
 119         .n_channels = ARRAY_SIZE(p54_achannels),
 120         .bitrates = p54_arates,
 121         .n_bitrates = ARRAY_SIZE(p54_arates),
 122 };
 123
 124 static int p54_convert_rev0(struct ieee80211_hw *dev,
 125                             struct pda_pa_curve_data *curve_data)
 126 {
 127         struct p54_common *priv = dev->priv;
 128         struct p54_pa_curve_data_sample *dst;
 129         struct pda_pa_curve_data_sample_rev0 *src;
 130         size_t cd_len = sizeof(*curve_data) +
 131                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 132                  curve_data->channels;
 133         unsigned int i, j;
 134         void *source, *target;
 135
 136         priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,
 137                                    GFP_KERNEL);
 138         if (!priv->curve_data)
 139                 return -ENOMEM;
 140
 141         priv->curve_data->entries = curve_data->channels;
 142         priv->curve_data->entry_size = sizeof(__le16) +
 143                 sizeof(*dst) * curve_data->points_per_channel;
 144         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 145         priv->curve_data->len = cd_len;
 146         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 147         source = curve_data->data;
 148         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 149         for (i = 0; i < curve_data->channels; i++) {
 150                 __le16 *freq = source;
 151                 source += sizeof(__le16);
 152                 *((__le16 *)target) = *freq;
 153                 target += sizeof(__le16);
 154                 for (j = 0; j < curve_data->points_per_channel; j++) {
 155                         dst = target;
 156                         src = source;
 157
 158                         dst->rf_power = src->rf_power;
 159                         dst->pa_detector = src->pa_detector;
 160                         dst->data_64qam = src->pcv;
 161                         /* "invent" the points for the other modulations */
 162 #define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))
 163                         dst->data_16qam = SUB(src->pcv, 12);
 164                         dst->data_qpsk = SUB(dst->data_16qam, 12);
 165                         dst->data_bpsk = SUB(dst->data_qpsk, 12);
 166                         dst->data_barker = SUB(dst->data_bpsk, 14);
 167 #undef SUB
 168                         target += sizeof(*dst);
 169                         source += sizeof(*src);
 170                 }
 171         }
 172
 173         return 0;
 174 }
 175
 176 static int p54_convert_rev1(struct ieee80211_hw *dev,
 177                             struct pda_pa_curve_data *curve_data)
 178 {
 179         struct p54_common *priv = dev->priv;
 180         struct p54_pa_curve_data_sample *dst;
 181         struct pda_pa_curve_data_sample_rev1 *src;
 182         size_t cd_len = sizeof(*curve_data) +
 183                 (curve_data->points_per_channel*sizeof(*dst) + 2) *
 184                  curve_data->channels;
 185         unsigned int i, j;
 186         void *source, *target;
 187
 188         priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),
 189                                    GFP_KERNEL);
 190         if (!priv->curve_data)
 191                 return -ENOMEM;
 192
 193         priv->curve_data->entries = curve_data->channels;
 194         priv->curve_data->entry_size = sizeof(__le16) +
 195                 sizeof(*dst) * curve_data->points_per_channel;
 196         priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);
 197         priv->curve_data->len = cd_len;
 198         memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));
 199         source = curve_data->data;
 200         target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;
 201         for (i = 0; i < curve_data->channels; i++) {
 202                 __le16 *freq = source;
 203                 source += sizeof(__le16);
 204                 *((__le16 *)target) = *freq;
 205                 target += sizeof(__le16);
 206                 for (j = 0; j < curve_data->points_per_channel; j++) {
 207                         memcpy(target, source, sizeof(*src));
 208
 209                         target += sizeof(*dst);
 210                         source += sizeof(*src);
 211                 }
 212                 source++;
 213         }
 214
 215         return 0;
 216 }
 217
 218 static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",
 219         "Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };
 220
 221 static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,
 222                              u16 type)
 223 {
 224         struct p54_common *priv = dev->priv;
 225         int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;
 226         int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;
 227         int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;
 228         int i;
 229
 230         if (len != (entry_size * num_entries)) {
 231                 printk(KERN_ERR "%s: unknown rssi calibration data packing "
 232                                  " type:(%x) len:%d.\n",
 233                        wiphy_name(dev->wiphy), type, len);
 234
 235                 print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,
 236                                      data, len);
 237
 238                 printk(KERN_ERR "%s: please report this issue.\n",
 239                         wiphy_name(dev->wiphy));
 240                 return;
 241         }
 242
 243         for (i = 0; i < num_entries; i++) {
 244                 struct pda_rssi_cal_entry *cal = data +
 245                                                  (offset + i * entry_size);
 246                 priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);
 247                 priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);
 248         }
 249 }
 250
 251 static void p54_parse_default_country(struct ieee80211_hw *dev,
 252                                       void *data, int len)
 253 {
 254         struct pda_country *country;
 255
 256         if (len != sizeof(*country)) {
 257                 printk(KERN_ERR "%s: found possible invalid default country "
 258                                 "eeprom entry. (entry size: %d)\n",
 259                        wiphy_name(dev->wiphy), len);
 260
 261                 print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,
 262                                      data, len);
 263
 264                 printk(KERN_ERR "%s: please report this issue.\n",
 265                         wiphy_name(dev->wiphy));
 266                 return;
 267         }
 268
 269         country = (struct pda_country *) data;
 270         if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)
 271                 regulatory_hint(dev->wiphy, country->alpha2);
 272         else {
 273                 /* TODO:
 274                  * write a shared/common function that converts
 275                  * "Regulatory domain codes" (802.11-2007 14.8.2.2)
 276                  * into ISO/IEC 3166-1 alpha2 for regulatory_hint.
 277                  */
 278         }
 279 }
 280
 281 static int p54_convert_output_limits(struct ieee80211_hw *dev,
 282                                      u8 *data, size_t len)
 283 {
 284         struct p54_common *priv = dev->priv;
 285
 286         if (len < 2)
 287                 return -EINVAL;
 288
 289         if (data[0] != 0) {
 290                 printk(KERN_ERR "%s: unknown output power db revision:%x\n",
 291                        wiphy_name(dev->wiphy), data[0]);
 292                 return -EINVAL;
 293         }
 294
 295         if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)
 296                 return -EINVAL;
 297
 298         priv->output_limit = kmalloc(data[1] *
 299                 sizeof(struct pda_channel_output_limit) +
 300                 sizeof(*priv->output_limit), GFP_KERNEL);
 301
 302         if (!priv->output_limit)
 303                 return -ENOMEM;
 304
 305         priv->output_limit->offset = 0;
 306         priv->output_limit->entries = data[1];
 307         priv->output_limit->entry_size =
 308                 sizeof(struct pda_channel_output_limit);
 309         priv->output_limit->len = priv->output_limit->entry_size *
 310                                   priv->output_limit->entries +
 311                                   priv->output_limit->offset;
 312
 313         memcpy(priv->output_limit->data, &data[2],
 314                data[1] * sizeof(struct pda_channel_output_limit));
 315
 316         return 0;
 317 }
 318
 319 static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,
 320                                                size_t total_len)
 321 {
 322         struct p54_cal_database *dst;
 323         size_t payload_len, entries, entry_size, offset;
 324
 325         payload_len = le16_to_cpu(src->len);
 326         entries = le16_to_cpu(src->entries);
 327         entry_size = le16_to_cpu(src->entry_size);
 328         offset = le16_to_cpu(src->offset);
 329         if (((entries * entry_size + offset) != payload_len) ||
 330              (payload_len + sizeof(*src) != total_len))
 331                 return NULL;
 332
 333         dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);
 334         if (!dst)
 335                 return NULL;
 336
 337         dst->entries = entries;
 338         dst->entry_size = entry_size;
 339         dst->offset = offset;
 340         dst->len = payload_len;
 341
 342         memcpy(dst->data, src->data, payload_len);
 343         return dst;
 344 }
 345
 346 int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)
 347 {
 348         struct p54_common *priv = dev->priv;
 349         struct eeprom_pda_wrap *wrap = NULL;
 350         struct pda_entry *entry;
 351         unsigned int data_len, entry_len;
 352         void *tmp;
 353         int err;
 354         u8 *end = (u8 *)eeprom + len;
 355         u16 synth = 0;
 356
 357         wrap = (struct eeprom_pda_wrap *) eeprom;
 358         entry = (void *)wrap->data + le16_to_cpu(wrap->len);
 359
 360         /* verify that at least the entry length/code fits */
 361         while ((u8 *)entry <= end - sizeof(*entry)) {
 362                 entry_len = le16_to_cpu(entry->len);
 363                 data_len = ((entry_len - 1) << 1);
 364
 365                 /* abort if entry exceeds whole structure */
 366                 if ((u8 *)entry + sizeof(*entry) + data_len > end)
 367                         break;
 368
 369                 switch (le16_to_cpu(entry->code)) {
 370                 case PDR_MAC_ADDRESS:
 371                         if (data_len != ETH_ALEN)
 372                                 break;
 373                         SET_IEEE80211_PERM_ADDR(dev, entry->data);
 374                         break;
 375                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:
 376                         if (priv->output_limit)
 377                                 break;
 378                         err = p54_convert_output_limits(dev, entry->data,
 379                                                         data_len);
 380                         if (err)
 381                                 goto err;
 382                         break;
 383                 case PDR_PRISM_PA_CAL_CURVE_DATA: {
 384                         struct pda_pa_curve_data *curve_data =
 385                                 (struct pda_pa_curve_data *)entry->data;
 386                         if (data_len < sizeof(*curve_data)) {
 387                                 err = -EINVAL;
 388                                 goto err;
 389                         }
 390
 391                         switch (curve_data->cal_method_rev) {
 392                         case 0:
 393                                 err = p54_convert_rev0(dev, curve_data);
 394                                 break;
 395                         case 1:
 396                                 err = p54_convert_rev1(dev, curve_data);
 397                                 break;
 398                         default:
 399                                 printk(KERN_ERR "%s: unknown curve data "
 400                                                 "revision %d\n",
 401                                                 wiphy_name(dev->wiphy),
 402                                                 curve_data->cal_method_rev);
 403                                 err = -ENODEV;
 404                                 break;
 405                         }
 406                         if (err)
 407                                 goto err;
 408                         }
 409                         break;
 410                 case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:
 411                         priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);
 412                         if (!priv->iq_autocal) {
 413                                 err = -ENOMEM;
 414                                 goto err;
 415                         }
 416
 417                         memcpy(priv->iq_autocal, entry->data, data_len);
 418                         priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);
 419                         break;
 420                 case PDR_DEFAULT_COUNTRY:
 421                         p54_parse_default_country(dev, entry->data, data_len);
 422                         break;
 423                 case PDR_INTERFACE_LIST:
 424                         tmp = entry->data;
 425                         while ((u8 *)tmp < entry->data + data_len) {
 426                                 struct exp_if *exp_if = tmp;
 427                                 if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))
 428                                         synth = le16_to_cpu(exp_if->variant);
 429                                 tmp += sizeof(*exp_if);
 430                         }
 431                         break;
 432                 case PDR_HARDWARE_PLATFORM_COMPONENT_ID:
 433                         if (data_len < 2)
 434                                 break;
 435                         priv->version = *(u8 *)(entry->data + 1);
 436                         break;
 437                 case PDR_RSSI_LINEAR_APPROXIMATION:
 438                 case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:
 439                 case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:
 440                         p54_parse_rssical(dev, entry->data, data_len,
 441                                           le16_to_cpu(entry->code));
 442                         break;
 443                 case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOM: {
 444                         __le16 *src = (void *) entry->data;
 445                         s16 *dst = (void *) &priv->rssical_db;
 446                         int i;
 447
 448                         if (data_len != sizeof(priv->rssical_db)) {
 449                                 err = -EINVAL;
 450                                 goto err;
 451                         }
 452                         for (i = 0; i < sizeof(priv->rssical_db) /
 453                                         sizeof(*src); i++)
 454                                 *(dst++) = (s16) le16_to_cpu(*(src++));
 455                         }
 456                         break;
 457                 case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {
 458                         struct pda_custom_wrapper *pda = (void *) entry->data;
 459                         if (priv->output_limit || data_len < sizeof(*pda))
 460                                 break;
 461                         priv->output_limit = p54_convert_db(pda, data_len);
 462                         }
 463                         break;
 464                 case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {
 465                         struct pda_custom_wrapper *pda = (void *) entry->data;
 466                         if (priv->curve_data || data_len < sizeof(*pda))
 467                                 break;
 468                         priv->curve_data = p54_convert_db(pda, data_len);
 469                         }
 470                         break;
 471                 case PDR_END:
 472                         /* make it overrun */
 473                         entry_len = len;
 474                         break;
 475                 default:
 476                         break;
 477                 }
 478
 479                 entry = (void *)entry + (entry_len + 1)*2;
 480         }
 481
 482         if (!synth || !priv->iq_autocal || !priv->output_limit ||
 483             !priv->curve_data) {
 484                 printk(KERN_ERR "%s: not all required entries found in eeprom!\n",
 485                         wiphy_name(dev->wiphy));
 486                 err = -EINVAL;
 487                 goto err;
 488         }
 489
 490         priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;
 491         if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)
 492                 p54_init_xbow_synth(priv);
 493         if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))
 494                 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;
 495         if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))
 496                 dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;
 497         if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)
 498                 priv->rx_diversity_mask = 3;
 499         if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)
 500                 priv->tx_diversity_mask = 3;
 501
 502         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 503                 u8 perm_addr[ETH_ALEN];
 504
 505                 printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",
 506                         wiphy_name(dev->wiphy));
 507                 random_ether_addr(perm_addr);
 508                 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
 509         }
 510
 511         printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",
 512                 wiphy_name(dev->wiphy), dev->wiphy->perm_addr, priv->version,
 513                 p54_rf_chips[priv->rxhw]);
 514
 515         return 0;
 516
 517 err:
 518         kfree(priv->iq_autocal);
 519         kfree(priv->output_limit);
 520         kfree(priv->curve_data);
 521         priv->iq_autocal = NULL;
 522         priv->output_limit = NULL;
 523         priv->curve_data = NULL;
 524
 525         printk(KERN_ERR "%s: eeprom parse failed!\n",
 526                 wiphy_name(dev->wiphy));
 527         return err;
 528 }
 529 EXPORT_SYMBOL_GPL(p54_parse_eeprom);
 530
 531 int p54_read_eeprom(struct ieee80211_hw *dev)
 532 {
 533         struct p54_common *priv = dev->priv;
 534         size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;
 535         int ret = -ENOMEM;
 536         void *eeprom = NULL;
 537
 538         maxblocksize = EEPROM_READBACK_LEN;
 539         if (priv->fw_var >= 0x509)
 540                 maxblocksize -= 0xc;
 541         else
 542                 maxblocksize -= 0x4;
 543
 544         eeprom = kzalloc(eeprom_size, GFP_KERNEL);
 545         if (unlikely(!eeprom))
 546                 goto free;
 547
 548         while (eeprom_size) {
 549                 blocksize = min(eeprom_size, maxblocksize);
 550                 ret = p54_download_eeprom(priv, (void *) (eeprom + offset),
 551                                           offset, blocksize);
 552                 if (unlikely(ret))
 553                         goto free;
 554
 555                 offset += blocksize;
 556                 eeprom_size -= blocksize;
 557         }
 558
 559         ret = p54_parse_eeprom(dev, eeprom, offset);
 560 free:
 561         kfree(eeprom);
 562         return ret;
 563 }
 564 EXPORT_SYMBOL_GPL(p54_read_eeprom);