drivers/net/wireless/rt2x00/rt2500usb.c

   1 /*
   2         Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2500usb
  23         Abstract: rt2500usb device specific routines.
  24         Supported chipsets: RT2570.
  25  */
  26
  27 /*
  28  * Set enviroment defines for rt2x00.h
  29  */
  30 #define DRV_NAME "rt2500usb"
  31
  32 #include <linux/delay.h>
  33 #include <linux/etherdevice.h>
  34 #include <linux/init.h>
  35 #include <linux/kernel.h>
  36 #include <linux/module.h>
  37 #include <linux/usb.h>
  38
  39 #include "rt2x00.h"
  40 #include "rt2x00usb.h"
  41 #include "rt2500usb.h"
  42
  43 /*
  44  * Register access.
  45  * All access to the CSR registers will go through the methods
  46  * rt2500usb_register_read and rt2500usb_register_write.
  47  * BBP and RF register require indirect register access,
  48  * and use the CSR registers BBPCSR and RFCSR to achieve this.
  49  * These indirect registers work with busy bits,
  50  * and we will try maximal REGISTER_BUSY_COUNT times to access
  51  * the register while taking a REGISTER_BUSY_DELAY us delay
  52  * between each attampt. When the busy bit is still set at that time,
  53  * the access attempt is considered to have failed,
  54  * and we will print an error.
  55  * If the usb_cache_mutex is already held then the _lock variants must
  56  * be used instead.
  57  */
  58 static inline void rt2500usb_register_read(struct rt2x00_dev *rt2x00dev,
  59                                            const unsigned int offset,
  60                                            u16 *value)
  61 {
  62         __le16 reg;
  63         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
  64                                       USB_VENDOR_REQUEST_IN, offset,
  65                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
  66         *value = le16_to_cpu(reg);
  67 }
  68
  69 static inline void rt2500usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
  70                                                 const unsigned int offset,
  71                                                 u16 *value)
  72 {
  73         __le16 reg;
  74         rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
  75                                        USB_VENDOR_REQUEST_IN, offset,
  76                                        &reg, sizeof(u16), REGISTER_TIMEOUT);
  77         *value = le16_to_cpu(reg);
  78 }
  79
  80 static inline void rt2500usb_register_multiread(struct rt2x00_dev *rt2x00dev,
  81                                                 const unsigned int offset,
  82                                                 void *value, const u16 length)
  83 {
  84         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
  85         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
  86                                       USB_VENDOR_REQUEST_IN, offset,
  87                                       value, length, timeout);
  88 }
  89
  90 static inline void rt2500usb_register_write(struct rt2x00_dev *rt2x00dev,
  91                                             const unsigned int offset,
  92                                             u16 value)
  93 {
  94         __le16 reg = cpu_to_le16(value);
  95         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
  96                                       USB_VENDOR_REQUEST_OUT, offset,
  97                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
  98 }
  99
 100 static inline void rt2500usb_register_write_lock(struct rt2x00_dev *rt2x00dev,
 101                                                  const unsigned int offset,
 102                                                  u16 value)
 103 {
 104         __le16 reg = cpu_to_le16(value);
 105         rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE,
 106                                        USB_VENDOR_REQUEST_OUT, offset,
 107                                        &reg, sizeof(u16), REGISTER_TIMEOUT);
 108 }
 109
 110 static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
 111                                                  const unsigned int offset,
 112                                                  void *value, const u16 length)
 113 {
 114         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
 115         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
 116                                       USB_VENDOR_REQUEST_OUT, offset,
 117                                       value, length, timeout);
 118 }
 119
 120 static u16 rt2500usb_bbp_check(struct rt2x00_dev *rt2x00dev)
 121 {
 122         u16 reg;
 123         unsigned int i;
 124
 125         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 126                 rt2500usb_register_read_lock(rt2x00dev, PHY_CSR8, &reg);
 127                 if (!rt2x00_get_field16(reg, PHY_CSR8_BUSY))
 128                         break;
 129                 udelay(REGISTER_BUSY_DELAY);
 130         }
 131
 132         return reg;
 133 }
 134
 135 static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev,
 136                                 const unsigned int word, const u8 value)
 137 {
 138         u16 reg;
 139
 140         mutex_lock(&rt2x00dev->usb_cache_mutex);
 141
 142         /*
 143          * Wait until the BBP becomes ready.
 144          */
 145         reg = rt2500usb_bbp_check(rt2x00dev);
 146         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 147                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Write failed.\n");
 148                 mutex_unlock(&rt2x00dev->usb_cache_mutex);
 149                 return;
 150         }
 151
 152         /*
 153          * Write the data into the BBP.
 154          */
 155         reg = 0;
 156         rt2x00_set_field16(&reg, PHY_CSR7_DATA, value);
 157         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
 158         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 0);
 159
 160         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);
 161
 162         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 163 }
 164
 165 static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev,
 166                                const unsigned int word, u8 *value)
 167 {
 168         u16 reg;
 169
 170         mutex_lock(&rt2x00dev->usb_cache_mutex);
 171
 172         /*
 173          * Wait until the BBP becomes ready.
 174          */
 175         reg = rt2500usb_bbp_check(rt2x00dev);
 176         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 177                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
 178                 return;
 179         }
 180
 181         /*
 182          * Write the request into the BBP.
 183          */
 184         reg = 0;
 185         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
 186         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 1);
 187
 188         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);
 189
 190         /*
 191          * Wait until the BBP becomes ready.
 192          */
 193         reg = rt2500usb_bbp_check(rt2x00dev);
 194         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 195                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
 196                 *value = 0xff;
 197                 mutex_unlock(&rt2x00dev->usb_cache_mutex);
 198                 return;
 199         }
 200
 201         rt2500usb_register_read_lock(rt2x00dev, PHY_CSR7, &reg);
 202         *value = rt2x00_get_field16(reg, PHY_CSR7_DATA);
 203
 204         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 205 }
 206
 207 static void rt2500usb_rf_write(struct rt2x00_dev *rt2x00dev,
 208                                const unsigned int word, const u32 value)
 209 {
 210         u16 reg;
 211         unsigned int i;
 212
 213         if (!word)
 214                 return;
 215
 216         mutex_lock(&rt2x00dev->usb_cache_mutex);
 217
 218         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 219                 rt2500usb_register_read_lock(rt2x00dev, PHY_CSR10, &reg);
 220                 if (!rt2x00_get_field16(reg, PHY_CSR10_RF_BUSY))
 221                         goto rf_write;
 222                 udelay(REGISTER_BUSY_DELAY);
 223         }
 224
 225         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 226         ERROR(rt2x00dev, "PHY_CSR10 register busy. Write failed.\n");
 227         return;
 228
 229 rf_write:
 230         reg = 0;
 231         rt2x00_set_field16(&reg, PHY_CSR9_RF_VALUE, value);
 232         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR9, reg);
 233
 234         reg = 0;
 235         rt2x00_set_field16(&reg, PHY_CSR10_RF_VALUE, value >> 16);
 236         rt2x00_set_field16(&reg, PHY_CSR10_RF_NUMBER_OF_BITS, 20);
 237         rt2x00_set_field16(&reg, PHY_CSR10_RF_IF_SELECT, 0);
 238         rt2x00_set_field16(&reg, PHY_CSR10_RF_BUSY, 1);
 239
 240         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR10, reg);
 241         rt2x00_rf_write(rt2x00dev, word, value);
 242
 243         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 244 }
 245
 246 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 247 #define CSR_OFFSET(__word)      ( CSR_REG_BASE + ((__word) * sizeof(u16)) )
 248
 249 static void rt2500usb_read_csr(struct rt2x00_dev *rt2x00dev,
 250                                const unsigned int word, u32 *data)
 251 {
 252         rt2500usb_register_read(rt2x00dev, CSR_OFFSET(word), (u16 *) data);
 253 }
 254
 255 static void rt2500usb_write_csr(struct rt2x00_dev *rt2x00dev,
 256                                 const unsigned int word, u32 data)
 257 {
 258         rt2500usb_register_write(rt2x00dev, CSR_OFFSET(word), data);
 259 }
 260
 261 static const struct rt2x00debug rt2500usb_rt2x00debug = {
 262         .owner  = THIS_MODULE,
 263         .csr    = {
 264                 .read           = rt2500usb_read_csr,
 265                 .write          = rt2500usb_write_csr,
 266                 .word_size      = sizeof(u16),
 267                 .word_count     = CSR_REG_SIZE / sizeof(u16),
 268         },
 269         .eeprom = {
 270                 .read           = rt2x00_eeprom_read,
 271                 .write          = rt2x00_eeprom_write,
 272                 .word_size      = sizeof(u16),
 273                 .word_count     = EEPROM_SIZE / sizeof(u16),
 274         },
 275         .bbp    = {
 276                 .read           = rt2500usb_bbp_read,
 277                 .write          = rt2500usb_bbp_write,
 278                 .word_size      = sizeof(u8),
 279                 .word_count     = BBP_SIZE / sizeof(u8),
 280         },
 281         .rf     = {
 282                 .read           = rt2x00_rf_read,
 283                 .write          = rt2500usb_rf_write,
 284                 .word_size      = sizeof(u32),
 285                 .word_count     = RF_SIZE / sizeof(u32),
 286         },
 287 };
 288 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 289
 290 /*
 291  * Configuration handlers.
 292  */
 293 static void rt2500usb_config_mac_addr(struct rt2x00_dev *rt2x00dev,
 294                                       __le32 *mac)
 295 {
 296         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, mac,
 297                                       (3 * sizeof(__le16)));
 298 }
 299
 300 static void rt2500usb_config_bssid(struct rt2x00_dev *rt2x00dev,
 301                                    __le32 *bssid)
 302 {
 303         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, bssid,
 304                                       (3 * sizeof(__le16)));
 305 }
 306
 307 static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 308                                   const int tsf_sync)
 309 {
 310         u16 reg;
 311
 312         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
 313
 314         /*
 315          * Enable beacon config
 316          */
 317         rt2500usb_register_read(rt2x00dev, TXRX_CSR20, &reg);
 318         rt2x00_set_field16(&reg, TXRX_CSR20_OFFSET,
 319                            (PREAMBLE + get_duration(IEEE80211_HEADER, 20)) >> 6);
 320         if (type == IEEE80211_IF_TYPE_STA)
 321                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 0);
 322         else
 323                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 2);
 324         rt2500usb_register_write(rt2x00dev, TXRX_CSR20, reg);
 325
 326         /*
 327          * Enable synchronisation.
 328          */
 329         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
 330         rt2x00_set_field16(&reg, TXRX_CSR18_OFFSET, 0);
 331         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 332
 333         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
 334         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 1);
 335         rt2x00_set_field16(&reg, TXRX_CSR19_TBCN, 1);
 336         rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 0);
 337         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, tsf_sync);
 338         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
 339 }
 340
 341 static void rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
 342                                       const int short_preamble,
 343                                       const int ack_timeout,
 344                                       const int ack_consume_time)
 345 {
 346         u16 reg;
 347
 348         /*
 349          * When in atomic context, reschedule and let rt2x00lib
 350          * call this function again.
 351          */
 352         if (in_atomic()) {
 353                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
 354                 return;
 355         }
 356
 357         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
 358         rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
 359         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 360
 361         rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
 362         rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
 363                            !!short_preamble);
 364         rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
 365 }
 366
 367 static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
 368                                      const int phymode,
 369                                      const int basic_rate_mask)
 370 {
 371         rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
 372
 373         if (phymode == HWMODE_B) {
 374                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x000b);
 375                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x0040);
 376         } else {
 377                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0005);
 378                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x016c);
 379         }
 380 }
 381
 382 static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
 383                                      struct rf_channel *rf, const int txpower)
 384 {
 385         /*
 386          * Set TXpower.
 387          */
 388         rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 389
 390         /*
 391          * For RT2525E we should first set the channel to half band higher.
 392          */
 393         if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
 394                 static const u32 vals[] = {
 395                         0x000008aa, 0x000008ae, 0x000008ae, 0x000008b2,
 396                         0x000008b2, 0x000008b6, 0x000008b6, 0x000008ba,
 397                         0x000008ba, 0x000008be, 0x000008b7, 0x00000902,
 398                         0x00000902, 0x00000906
 399                 };
 400
 401                 rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
 402                 if (rf->rf4)
 403                         rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 404         }
 405
 406         rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
 407         rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
 408         rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
 409         if (rf->rf4)
 410                 rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 411 }
 412
 413 static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 414                                      const int txpower)
 415 {
 416         u32 rf3;
 417
 418         rt2x00_rf_read(rt2x00dev, 3, &rf3);
 419         rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 420         rt2500usb_rf_write(rt2x00dev, 3, rf3);
 421 }
 422
 423 static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
 424                                      struct antenna_setup *ant)
 425 {
 426         u8 r2;
 427         u8 r14;
 428         u16 csr5;
 429         u16 csr6;
 430
 431         rt2500usb_bbp_read(rt2x00dev, 2, &r2);
 432         rt2500usb_bbp_read(rt2x00dev, 14, &r14);
 433         rt2500usb_register_read(rt2x00dev, PHY_CSR5, &csr5);
 434         rt2500usb_register_read(rt2x00dev, PHY_CSR6, &csr6);
 435
 436         /*
 437          * Configure the TX antenna.
 438          */
 439         switch (ant->tx) {
 440         case ANTENNA_HW_DIVERSITY:
 441                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 1);
 442                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 1);
 443                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 1);
 444                 break;
 445         case ANTENNA_A:
 446                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
 447                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 0);
 448                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 0);
 449                 break;
 450         case ANTENNA_SW_DIVERSITY:
 451                 /*
 452                  * NOTE: We should never come here because rt2x00lib is
 453                  * supposed to catch this and send us the correct antenna
 454                  * explicitely. However we are nog going to bug about this.
 455                  * Instead, just default to antenna B.
 456                  */
 457         case ANTENNA_B:
 458                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
 459                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 2);
 460                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 2);
 461                 break;
 462         }
 463
 464         /*
 465          * Configure the RX antenna.
 466          */
 467         switch (ant->rx) {
 468         case ANTENNA_HW_DIVERSITY:
 469                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 1);
 470                 break;
 471         case ANTENNA_A:
 472                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
 473                 break;
 474         case ANTENNA_SW_DIVERSITY:
 475                 /*
 476                  * NOTE: We should never come here because rt2x00lib is
 477                  * supposed to catch this and send us the correct antenna
 478                  * explicitely. However we are nog going to bug about this.
 479                  * Instead, just default to antenna B.
 480                  */
 481         case ANTENNA_B:
 482                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 2);
 483                 break;
 484         }
 485
 486         /*
 487          * RT2525E and RT5222 need to flip TX I/Q
 488          */
 489         if (rt2x00_rf(&rt2x00dev->chip, RF2525E) ||
 490             rt2x00_rf(&rt2x00dev->chip, RF5222)) {
 491                 rt2x00_set_field8(&r2, BBP_R2_TX_IQ_FLIP, 1);
 492                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 1);
 493                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 1);
 494
 495                 /*
 496                  * RT2525E does not need RX I/Q Flip.
 497                  */
 498                 if (rt2x00_rf(&rt2x00dev->chip, RF2525E))
 499                         rt2x00_set_field8(&r14, BBP_R14_RX_IQ_FLIP, 0);
 500         } else {
 501                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 0);
 502                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 0);
 503         }
 504
 505         rt2500usb_bbp_write(rt2x00dev, 2, r2);
 506         rt2500usb_bbp_write(rt2x00dev, 14, r14);
 507         rt2500usb_register_write(rt2x00dev, PHY_CSR5, csr5);
 508         rt2500usb_register_write(rt2x00dev, PHY_CSR6, csr6);
 509 }
 510
 511 static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
 512                                       struct rt2x00lib_conf *libconf)
 513 {
 514         u16 reg;
 515
 516         rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
 517
 518         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
 519         rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
 520                            libconf->conf->beacon_int * 4);
 521         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 522 }
 523
 524 static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
 525                              const unsigned int flags,
 526                              struct rt2x00lib_conf *libconf)
 527 {
 528         if (flags & CONFIG_UPDATE_PHYMODE)
 529                 rt2500usb_config_phymode(rt2x00dev, libconf->phymode,
 530                                          libconf->basic_rates);
 531         if (flags & CONFIG_UPDATE_CHANNEL)
 532                 rt2500usb_config_channel(rt2x00dev, &libconf->rf,
 533                                          libconf->conf->power_level);
 534         if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
 535                 rt2500usb_config_txpower(rt2x00dev,
 536                                          libconf->conf->power_level);
 537         if (flags & CONFIG_UPDATE_ANTENNA)
 538                 rt2500usb_config_antenna(rt2x00dev, &libconf->ant);
 539         if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
 540                 rt2500usb_config_duration(rt2x00dev, libconf);
 541 }
 542
 543 /*
 544  * LED functions.
 545  */
 546 static void rt2500usb_enable_led(struct rt2x00_dev *rt2x00dev)
 547 {
 548         u16 reg;
 549
 550         rt2500usb_register_read(rt2x00dev, MAC_CSR21, &reg);
 551         rt2x00_set_field16(&reg, MAC_CSR21_ON_PERIOD, 70);
 552         rt2x00_set_field16(&reg, MAC_CSR21_OFF_PERIOD, 30);
 553         rt2500usb_register_write(rt2x00dev, MAC_CSR21, reg);
 554
 555         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
 556         rt2x00_set_field16(&reg, MAC_CSR20_LINK,
 557                            (rt2x00dev->led_mode != LED_MODE_ASUS));
 558         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY,
 559                            (rt2x00dev->led_mode != LED_MODE_TXRX_ACTIVITY));
 560         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
 561 }
 562
 563 static void rt2500usb_disable_led(struct rt2x00_dev *rt2x00dev)
 564 {
 565         u16 reg;
 566
 567         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
 568         rt2x00_set_field16(&reg, MAC_CSR20_LINK, 0);
 569         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY, 0);
 570         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
 571 }
 572
 573 /*
 574  * Link tuning
 575  */
 576 static void rt2500usb_link_stats(struct rt2x00_dev *rt2x00dev,
 577                                  struct link_qual *qual)
 578 {
 579         u16 reg;
 580
 581         /*
 582          * Update FCS error count from register.
 583          */
 584         rt2500usb_register_read(rt2x00dev, STA_CSR0, &reg);
 585         qual->rx_failed = rt2x00_get_field16(reg, STA_CSR0_FCS_ERROR);
 586
 587         /*
 588          * Update False CCA count from register.
 589          */
 590         rt2500usb_register_read(rt2x00dev, STA_CSR3, &reg);
 591         qual->false_cca = rt2x00_get_field16(reg, STA_CSR3_FALSE_CCA_ERROR);
 592 }
 593
 594 static void rt2500usb_reset_tuner(struct rt2x00_dev *rt2x00dev)
 595 {
 596         u16 eeprom;
 597         u16 value;
 598
 599         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &eeprom);
 600         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R24_LOW);
 601         rt2500usb_bbp_write(rt2x00dev, 24, value);
 602
 603         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &eeprom);
 604         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R25_LOW);
 605         rt2500usb_bbp_write(rt2x00dev, 25, value);
 606
 607         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &eeprom);
 608         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R61_LOW);
 609         rt2500usb_bbp_write(rt2x00dev, 61, value);
 610
 611         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &eeprom);
 612         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_VGCUPPER);
 613         rt2500usb_bbp_write(rt2x00dev, 17, value);
 614
 615         rt2x00dev->link.vgc_level = value;
 616 }
 617
 618 static void rt2500usb_link_tuner(struct rt2x00_dev *rt2x00dev)
 619 {
 620         int rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
 621         u16 bbp_thresh;
 622         u16 vgc_bound;
 623         u16 sens;
 624         u16 r24;
 625         u16 r25;
 626         u16 r61;
 627         u16 r17_sens;
 628         u8 r17;
 629         u8 up_bound;
 630         u8 low_bound;
 631
 632         /*
 633          * Determine the BBP tuning threshold and correctly
 634          * set BBP 24, 25 and 61.
 635          */
 636         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &bbp_thresh);
 637         bbp_thresh = rt2x00_get_field16(bbp_thresh, EEPROM_BBPTUNE_THRESHOLD);
 638
 639         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &r24);
 640         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &r25);
 641         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &r61);
 642
 643         if ((rssi + bbp_thresh) > 0) {
 644                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_HIGH);
 645                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_HIGH);
 646                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_HIGH);
 647         } else {
 648                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_LOW);
 649                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_LOW);
 650                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_LOW);
 651         }
 652
 653         rt2500usb_bbp_write(rt2x00dev, 24, r24);
 654         rt2500usb_bbp_write(rt2x00dev, 25, r25);
 655         rt2500usb_bbp_write(rt2x00dev, 61, r61);
 656
 657         /*
 658          * Read current r17 value, as well as the sensitivity values
 659          * for the r17 register.
 660          */
 661         rt2500usb_bbp_read(rt2x00dev, 17, &r17);
 662         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &r17_sens);
 663
 664         /*
 665          * A too low RSSI will cause too much false CCA which will
 666          * then corrupt the R17 tuning. To remidy this the tuning should
 667          * be stopped (While making sure the R17 value will not exceed limits)
 668          */
 669         if (rssi >= -40) {
 670                 if (r17 != 0x60)
 671                         rt2500usb_bbp_write(rt2x00dev, 17, 0x60);
 672                 return;
 673         }
 674
 675         /*
 676          * Special big-R17 for short distance
 677          */
 678         if (rssi >= -58) {
 679                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_LOW);
 680                 if (r17 != sens)
 681                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
 682                 return;
 683         }
 684
 685         /*
 686          * Special mid-R17 for middle distance
 687          */
 688         if (rssi >= -74) {
 689                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_HIGH);
 690                 if (r17 != sens)
 691                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
 692                 return;
 693         }
 694
 695         /*
 696          * Leave short or middle distance condition, restore r17
 697          * to the dynamic tuning range.
 698          */
 699         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &vgc_bound);
 700         vgc_bound = rt2x00_get_field16(vgc_bound, EEPROM_BBPTUNE_VGCUPPER);
 701
 702         low_bound = 0x32;
 703         if (rssi >= -77)
 704                 up_bound = vgc_bound;
 705         else
 706                 up_bound = vgc_bound - (-77 - rssi);
 707
 708         if (up_bound < low_bound)
 709                 up_bound = low_bound;
 710
 711         if (r17 > up_bound) {
 712                 rt2500usb_bbp_write(rt2x00dev, 17, up_bound);
 713                 rt2x00dev->link.vgc_level = up_bound;
 714         } else if (rt2x00dev->link.qual.false_cca > 512 && r17 < up_bound) {
 715                 rt2500usb_bbp_write(rt2x00dev, 17, ++r17);
 716                 rt2x00dev->link.vgc_level = r17;
 717         } else if (rt2x00dev->link.qual.false_cca < 100 && r17 > low_bound) {
 718                 rt2500usb_bbp_write(rt2x00dev, 17, --r17);
 719                 rt2x00dev->link.vgc_level = r17;
 720         }
 721 }
 722
 723 /*
 724  * Initialization functions.
 725  */
 726 static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
 727 {
 728         u16 reg;
 729
 730         rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE, 0x0001,
 731                                     USB_MODE_TEST, REGISTER_TIMEOUT);
 732         rt2x00usb_vendor_request_sw(rt2x00dev, USB_SINGLE_WRITE, 0x0308,
 733                                     0x00f0, REGISTER_TIMEOUT);
 734
 735         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
 736         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX, 1);
 737         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
 738
 739         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x1111);
 740         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x1e11);
 741
 742         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 743         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 1);
 744         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 1);
 745         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
 746         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 747
 748         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 749         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
 750         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
 751         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
 752         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 753
 754         rt2500usb_register_read(rt2x00dev, TXRX_CSR5, &reg);
 755         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0, 13);
 756         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0_VALID, 1);
 757         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1, 12);
 758         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1_VALID, 1);
 759         rt2500usb_register_write(rt2x00dev, TXRX_CSR5, reg);
 760
 761         rt2500usb_register_read(rt2x00dev, TXRX_CSR6, &reg);
 762         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0, 10);
 763         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0_VALID, 1);
 764         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1, 11);
 765         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1_VALID, 1);
 766         rt2500usb_register_write(rt2x00dev, TXRX_CSR6, reg);
 767
 768         rt2500usb_register_read(rt2x00dev, TXRX_CSR7, &reg);
 769         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0, 7);
 770         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0_VALID, 1);
 771         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1, 6);
 772         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1_VALID, 1);
 773         rt2500usb_register_write(rt2x00dev, TXRX_CSR7, reg);
 774
 775         rt2500usb_register_read(rt2x00dev, TXRX_CSR8, &reg);
 776         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0, 5);
 777         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0_VALID, 1);
 778         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1, 0);
 779         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1_VALID, 0);
 780         rt2500usb_register_write(rt2x00dev, TXRX_CSR8, reg);
 781
 782         rt2500usb_register_write(rt2x00dev, TXRX_CSR21, 0xe78f);
 783         rt2500usb_register_write(rt2x00dev, MAC_CSR9, 0xff1d);
 784
 785         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
 786                 return -EBUSY;
 787
 788         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 789         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
 790         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
 791         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 1);
 792         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 793
 794         if (rt2x00_rev(&rt2x00dev->chip) >= RT2570_VERSION_C) {
 795                 rt2500usb_register_read(rt2x00dev, PHY_CSR2, &reg);
 796                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 0);
 797         } else {
 798                 reg = 0;
 799                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 1);
 800                 rt2x00_set_field16(&reg, PHY_CSR2_LNA_MODE, 3);
 801         }
 802         rt2500usb_register_write(rt2x00dev, PHY_CSR2, reg);
 803
 804         rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0002);
 805         rt2500usb_register_write(rt2x00dev, MAC_CSR22, 0x0053);
 806         rt2500usb_register_write(rt2x00dev, MAC_CSR15, 0x01ee);
 807         rt2500usb_register_write(rt2x00dev, MAC_CSR16, 0x0000);
 808
 809         rt2500usb_register_read(rt2x00dev, MAC_CSR8, &reg);
 810         rt2x00_set_field16(&reg, MAC_CSR8_MAX_FRAME_UNIT,
 811                            rt2x00dev->rx->data_size);
 812         rt2500usb_register_write(rt2x00dev, MAC_CSR8, reg);
 813
 814         rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
 815         rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
 816         rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0xff);
 817         rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);
 818
 819         rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
 820         rt2x00_set_field16(&reg, MAC_CSR18_DELAY_AFTER_BEACON, 90);
 821         rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);
 822
 823         rt2500usb_register_read(rt2x00dev, PHY_CSR4, &reg);
 824         rt2x00_set_field16(&reg, PHY_CSR4_LOW_RF_LE, 1);
 825         rt2500usb_register_write(rt2x00dev, PHY_CSR4, reg);
 826
 827         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
 828         rt2x00_set_field16(&reg, TXRX_CSR1_AUTO_SEQUENCE, 1);
 829         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 830
 831         return 0;
 832 }
 833
 834 static int rt2500usb_init_bbp(struct rt2x00_dev *rt2x00dev)
 835 {
 836         unsigned int i;
 837         u16 eeprom;
 838         u8 value;
 839         u8 reg_id;
 840
 841         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 842                 rt2500usb_bbp_read(rt2x00dev, 0, &value);
 843                 if ((value != 0xff) && (value != 0x00))
 844                         goto continue_csr_init;
 845                 NOTICE(rt2x00dev, "Waiting for BBP register.\n");
 846                 udelay(REGISTER_BUSY_DELAY);
 847         }
 848
 849         ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
 850         return -EACCES;
 851
 852 continue_csr_init:
 853         rt2500usb_bbp_write(rt2x00dev, 3, 0x02);
 854         rt2500usb_bbp_write(rt2x00dev, 4, 0x19);
 855         rt2500usb_bbp_write(rt2x00dev, 14, 0x1c);
 856         rt2500usb_bbp_write(rt2x00dev, 15, 0x30);
 857         rt2500usb_bbp_write(rt2x00dev, 16, 0xac);
 858         rt2500usb_bbp_write(rt2x00dev, 18, 0x18);
 859         rt2500usb_bbp_write(rt2x00dev, 19, 0xff);
 860         rt2500usb_bbp_write(rt2x00dev, 20, 0x1e);
 861         rt2500usb_bbp_write(rt2x00dev, 21, 0x08);
 862         rt2500usb_bbp_write(rt2x00dev, 22, 0x08);
 863         rt2500usb_bbp_write(rt2x00dev, 23, 0x08);
 864         rt2500usb_bbp_write(rt2x00dev, 24, 0x80);
 865         rt2500usb_bbp_write(rt2x00dev, 25, 0x50);
 866         rt2500usb_bbp_write(rt2x00dev, 26, 0x08);
 867         rt2500usb_bbp_write(rt2x00dev, 27, 0x23);
 868         rt2500usb_bbp_write(rt2x00dev, 30, 0x10);
 869         rt2500usb_bbp_write(rt2x00dev, 31, 0x2b);
 870         rt2500usb_bbp_write(rt2x00dev, 32, 0xb9);
 871         rt2500usb_bbp_write(rt2x00dev, 34, 0x12);
 872         rt2500usb_bbp_write(rt2x00dev, 35, 0x50);
 873         rt2500usb_bbp_write(rt2x00dev, 39, 0xc4);
 874         rt2500usb_bbp_write(rt2x00dev, 40, 0x02);
 875         rt2500usb_bbp_write(rt2x00dev, 41, 0x60);
 876         rt2500usb_bbp_write(rt2x00dev, 53, 0x10);
 877         rt2500usb_bbp_write(rt2x00dev, 54, 0x18);
 878         rt2500usb_bbp_write(rt2x00dev, 56, 0x08);
 879         rt2500usb_bbp_write(rt2x00dev, 57, 0x10);
 880         rt2500usb_bbp_write(rt2x00dev, 58, 0x08);
 881         rt2500usb_bbp_write(rt2x00dev, 61, 0x60);
 882         rt2500usb_bbp_write(rt2x00dev, 62, 0x10);
 883         rt2500usb_bbp_write(rt2x00dev, 75, 0xff);
 884
 885         DEBUG(rt2x00dev, "Start initialization from EEPROM...\n");
 886         for (i = 0; i < EEPROM_BBP_SIZE; i++) {
 887                 rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);
 888
 889                 if (eeprom != 0xffff && eeprom != 0x0000) {
 890                         reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
 891                         value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
 892                         DEBUG(rt2x00dev, "BBP: 0x%02x, value: 0x%02x.\n",
 893                               reg_id, value);
 894                         rt2500usb_bbp_write(rt2x00dev, reg_id, value);
 895                 }
 896         }
 897         DEBUG(rt2x00dev, "...End initialization from EEPROM.\n");
 898
 899         return 0;
 900 }
 901
 902 /*
 903  * Device state switch handlers.
 904  */
 905 static void rt2500usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
 906                                 enum dev_state state)
 907 {
 908         u16 reg;
 909
 910         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
 911         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX,
 912                            state == STATE_RADIO_RX_OFF);
 913         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
 914 }
 915
 916 static int rt2500usb_enable_radio(struct rt2x00_dev *rt2x00dev)
 917 {
 918         /*
 919          * Initialize all registers.
 920          */
 921         if (rt2500usb_init_registers(rt2x00dev) ||
 922             rt2500usb_init_bbp(rt2x00dev)) {
 923                 ERROR(rt2x00dev, "Register initialization failed.\n");
 924                 return -EIO;
 925         }
 926
 927         rt2x00usb_enable_radio(rt2x00dev);
 928
 929         /*
 930          * Enable LED
 931          */
 932         rt2500usb_enable_led(rt2x00dev);
 933
 934         return 0;
 935 }
 936
 937 static void rt2500usb_disable_radio(struct rt2x00_dev *rt2x00dev)
 938 {
 939         /*
 940          * Disable LED
 941          */
 942         rt2500usb_disable_led(rt2x00dev);
 943
 944         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x2121);
 945         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x2121);
 946
 947         /*
 948          * Disable synchronisation.
 949          */
 950         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
 951
 952         rt2x00usb_disable_radio(rt2x00dev);
 953 }
 954
 955 static int rt2500usb_set_state(struct rt2x00_dev *rt2x00dev,
 956                                enum dev_state state)
 957 {
 958         u16 reg;
 959         u16 reg2;
 960         unsigned int i;
 961         char put_to_sleep;
 962         char bbp_state;
 963         char rf_state;
 964
 965         put_to_sleep = (state != STATE_AWAKE);
 966
 967         reg = 0;
 968         rt2x00_set_field16(&reg, MAC_CSR17_BBP_DESIRE_STATE, state);
 969         rt2x00_set_field16(&reg, MAC_CSR17_RF_DESIRE_STATE, state);
 970         rt2x00_set_field16(&reg, MAC_CSR17_PUT_TO_SLEEP, put_to_sleep);
 971         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 972         rt2x00_set_field16(&reg, MAC_CSR17_SET_STATE, 1);
 973         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 974
 975         /*
 976          * Device is not guaranteed to be in the requested state yet.
 977          * We must wait until the register indicates that the
 978          * device has entered the correct state.
 979          */
 980         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 981                 rt2500usb_register_read(rt2x00dev, MAC_CSR17, &reg2);
 982                 bbp_state = rt2x00_get_field16(reg2, MAC_CSR17_BBP_CURR_STATE);
 983                 rf_state = rt2x00_get_field16(reg2, MAC_CSR17_RF_CURR_STATE);
 984                 if (bbp_state == state && rf_state == state)
 985                         return 0;
 986                 rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 987                 msleep(30);
 988         }
 989
 990         NOTICE(rt2x00dev, "Device failed to enter state %d, "
 991                "current device state: bbp %d and rf %d.\n",
 992                state, bbp_state, rf_state);
 993
 994         return -EBUSY;
 995 }
 996
 997 static int rt2500usb_set_device_state(struct rt2x00_dev *rt2x00dev,
 998                                       enum dev_state state)
 999 {
1000         int retval = 0;
1001
1002         switch (state) {
1003         case STATE_RADIO_ON:
1004                 retval = rt2500usb_enable_radio(rt2x00dev);
1005                 break;
1006         case STATE_RADIO_OFF:
1007                 rt2500usb_disable_radio(rt2x00dev);
1008                 break;
1009         case STATE_RADIO_RX_ON:
1010         case STATE_RADIO_RX_OFF:
1011                 rt2500usb_toggle_rx(rt2x00dev, state);
1012                 break;
1013         case STATE_DEEP_SLEEP:
1014         case STATE_SLEEP:
1015         case STATE_STANDBY:
1016         case STATE_AWAKE:
1017                 retval = rt2500usb_set_state(rt2x00dev, state);
1018                 break;
1019         default:
1020                 retval = -ENOTSUPP;
1021                 break;
1022         }
1023
1024         return retval;
1025 }
1026
1027 /*
1028  * TX descriptor initialization
1029  */
1030 static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
1031                                     __le32 *txd,
1032                                     struct txdata_entry_desc *desc,
1033                                     struct ieee80211_hdr *ieee80211hdr,
1034                                     unsigned int length,
1035                                     struct ieee80211_tx_control *control)
1036 {
1037         u32 word;
1038
1039         /*
1040          * Start writing the descriptor words.
1041          */
1042         rt2x00_desc_read(txd, 1, &word);
1043         rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
1044         rt2x00_set_field32(&word, TXD_W1_AIFS, desc->aifs);
1045         rt2x00_set_field32(&word, TXD_W1_CWMIN, desc->cw_min);
1046         rt2x00_set_field32(&word, TXD_W1_CWMAX, desc->cw_max);
1047         rt2x00_desc_write(txd, 1, word);
1048
1049         rt2x00_desc_read(txd, 2, &word);
1050         rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, desc->signal);
1051         rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, desc->service);
1052         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, desc->length_low);
1053         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, desc->length_high);
1054         rt2x00_desc_write(txd, 2, word);
1055
1056         rt2x00_desc_read(txd, 0, &word);
1057         rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, control->retry_limit);
1058         rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
1059                            test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
1060         rt2x00_set_field32(&word, TXD_W0_ACK,
1061                            test_bit(ENTRY_TXD_ACK, &desc->flags));
1062         rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
1063                            test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
1064         rt2x00_set_field32(&word, TXD_W0_OFDM,
1065                            test_bit(ENTRY_TXD_OFDM_RATE, &desc->flags));
1066         rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
1067                            !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));
1068         rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);
1069         rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
1070         rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
1071         rt2x00_desc_write(txd, 0, word);
1072 }
1073
1074 static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
1075                                      struct sk_buff *skb)
1076 {
1077         int length;
1078
1079         /*
1080          * The length _must_ be a multiple of 2,
1081          * but it must _not_ be a multiple of the USB packet size.
1082          */
1083         length = roundup(skb->len, 2);
1084         length += (2 * !(length % rt2x00dev->usb_maxpacket));
1085
1086         return length;
1087 }
1088
1089 /*
1090  * TX data initialization
1091  */
1092 static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
1093                                     unsigned int queue)
1094 {
1095         u16 reg;
1096
1097         if (queue != IEEE80211_TX_QUEUE_BEACON)
1098                 return;
1099
1100         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
1101         if (!rt2x00_get_field16(reg, TXRX_CSR19_BEACON_GEN)) {
1102                 rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 1);
1103                 /*
1104                  * Beacon generation will fail initially.
1105                  * To prevent this we need to register the TXRX_CSR19
1106                  * register several times.
1107                  */
1108                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1109                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
1110                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1111                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
1112                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1113         }
1114 }
1115
1116 /*
1117  * RX control handlers
1118  */
1119 static void rt2500usb_fill_rxdone(struct data_entry *entry,
1120                                   struct rxdata_entry_desc *desc)
1121 {
1122         struct urb *urb = entry->priv;
1123         __le32 *rxd = (__le32 *)(entry->skb->data +
1124                                  (urb->actual_length - entry->ring->desc_size));
1125         u32 word0;
1126         u32 word1;
1127
1128         rt2x00_desc_read(rxd, 0, &word0);
1129         rt2x00_desc_read(rxd, 1, &word1);
1130
1131         desc->flags = 0;
1132         if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
1133                 desc->flags |= RX_FLAG_FAILED_FCS_CRC;
1134         if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
1135                 desc->flags |= RX_FLAG_FAILED_PLCP_CRC;
1136
1137         /*
1138          * Obtain the status about this packet.
1139          */
1140         desc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
1141         desc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -
1142             entry->ring->rt2x00dev->rssi_offset;
1143         desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
1144         desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
1145
1146         return;
1147 }
1148
1149 /*
1150  * Interrupt functions.
1151  */
1152 static void rt2500usb_beacondone(struct urb *urb)
1153 {
1154         struct data_entry *entry = (struct data_entry *)urb->context;
1155         struct data_ring *ring = entry->ring;
1156
1157         if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))
1158                 return;
1159
1160         /*
1161          * Check if this was the guardian beacon,
1162          * if that was the case we need to send the real beacon now.
1163          * Otherwise we should free the sk_buffer, the device
1164          * should be doing the rest of the work now.
1165          */
1166         if (ring->index == 1) {
1167                 rt2x00_ring_index_done_inc(ring);
1168                 entry = rt2x00_get_data_entry(ring);
1169                 usb_submit_urb(entry->priv, GFP_ATOMIC);
1170                 rt2x00_ring_index_inc(ring);
1171         } else if (ring->index_done == 1) {
1172                 entry = rt2x00_get_data_entry_done(ring);
1173                 if (entry->skb) {
1174                         dev_kfree_skb(entry->skb);
1175                         entry->skb = NULL;
1176                 }
1177                 rt2x00_ring_index_done_inc(ring);
1178         }
1179 }
1180
1181 /*
1182  * Device probe functions.
1183  */
1184 static int rt2500usb_validate_eeprom(struct rt2x00_dev *rt2x00dev)
1185 {
1186         u16 word;
1187         u8 *mac;
1188
1189         rt2x00usb_eeprom_read(rt2x00dev, rt2x00dev->eeprom, EEPROM_SIZE);
1190
1191         /*
1192          * Start validation of the data that has been read.
1193          */
1194         mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
1195         if (!is_valid_ether_addr(mac)) {
1196                 DECLARE_MAC_BUF(macbuf);
1197
1198                 random_ether_addr(mac);
1199                 EEPROM(rt2x00dev, "MAC: %s\n", print_mac(macbuf, mac));
1200         }
1201
1202         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
1203         if (word == 0xffff) {
1204                 rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
1205                 rt2x00_set_field16(&word, EEPROM_ANTENNA_TX_DEFAULT,
1206                                    ANTENNA_SW_DIVERSITY);
1207                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RX_DEFAULT,
1208                                    ANTENNA_SW_DIVERSITY);
1209                 rt2x00_set_field16(&word, EEPROM_ANTENNA_LED_MODE,
1210                                    LED_MODE_DEFAULT);
1211                 rt2x00_set_field16(&word, EEPROM_ANTENNA_DYN_TXAGC, 0);
1212                 rt2x00_set_field16(&word, EEPROM_ANTENNA_HARDWARE_RADIO, 0);
1213                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF2522);
1214                 rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
1215                 EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
1216         }
1217
1218         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
1219         if (word == 0xffff) {
1220                 rt2x00_set_field16(&word, EEPROM_NIC_CARDBUS_ACCEL, 0);
1221                 rt2x00_set_field16(&word, EEPROM_NIC_DYN_BBP_TUNE, 0);
1222                 rt2x00_set_field16(&word, EEPROM_NIC_CCK_TX_POWER, 0);
1223                 rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
1224                 EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
1225         }
1226
1227         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &word);
1228         if (word == 0xffff) {
1229                 rt2x00_set_field16(&word, EEPROM_CALIBRATE_OFFSET_RSSI,
1230                                    DEFAULT_RSSI_OFFSET);
1231                 rt2x00_eeprom_write(rt2x00dev, EEPROM_CALIBRATE_OFFSET, word);
1232                 EEPROM(rt2x00dev, "Calibrate offset: 0x%04x\n", word);
1233         }
1234
1235         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &word);
1236         if (word == 0xffff) {
1237                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_THRESHOLD, 45);
1238                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE, word);
1239                 EEPROM(rt2x00dev, "BBPtune: 0x%04x\n", word);
1240         }
1241
1242         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &word);
1243         if (word == 0xffff) {
1244                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCUPPER, 0x40);
1245                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_VGC, word);
1246                 EEPROM(rt2x00dev, "BBPtune vgc: 0x%04x\n", word);
1247         }
1248
1249         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &word);
1250         if (word == 0xffff) {
1251                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_LOW, 0x48);
1252                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_HIGH, 0x41);
1253                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R17, word);
1254                 EEPROM(rt2x00dev, "BBPtune r17: 0x%04x\n", word);
1255         }
1256
1257         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &word);
1258         if (word == 0xffff) {
1259                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_LOW, 0x40);
1260                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_HIGH, 0x80);
1261                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R24, word);
1262                 EEPROM(rt2x00dev, "BBPtune r24: 0x%04x\n", word);
1263         }
1264
1265         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &word);
1266         if (word == 0xffff) {
1267                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_LOW, 0x40);
1268                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_HIGH, 0x50);
1269                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R25, word);
1270                 EEPROM(rt2x00dev, "BBPtune r25: 0x%04x\n", word);
1271         }
1272
1273         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &word);
1274         if (word == 0xffff) {
1275                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_LOW, 0x60);
1276                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_HIGH, 0x6d);
1277                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R61, word);
1278                 EEPROM(rt2x00dev, "BBPtune r61: 0x%04x\n", word);
1279         }
1280
1281         return 0;
1282 }
1283
1284 static int rt2500usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
1285 {
1286         u16 reg;
1287         u16 value;
1288         u16 eeprom;
1289
1290         /*
1291          * Read EEPROM word for configuration.
1292          */
1293         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
1294
1295         /*
1296          * Identify RF chipset.
1297          */
1298         value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
1299         rt2500usb_register_read(rt2x00dev, MAC_CSR0, &reg);
1300         rt2x00_set_chip(rt2x00dev, RT2570, value, reg);
1301
1302         if (!rt2x00_check_rev(&rt2x00dev->chip, 0)) {
1303                 ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
1304                 return -ENODEV;
1305         }
1306
1307         if (!rt2x00_rf(&rt2x00dev->chip, RF2522) &&
1308             !rt2x00_rf(&rt2x00dev->chip, RF2523) &&
1309             !rt2x00_rf(&rt2x00dev->chip, RF2524) &&
1310             !rt2x00_rf(&rt2x00dev->chip, RF2525) &&
1311             !rt2x00_rf(&rt2x00dev->chip, RF2525E) &&
1312             !rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1313                 ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
1314                 return -ENODEV;
1315         }
1316
1317         /*
1318          * Identify default antenna configuration.
1319          */
1320         rt2x00dev->default_ant.tx =
1321             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TX_DEFAULT);
1322         rt2x00dev->default_ant.rx =
1323             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_DEFAULT);
1324
1325         /*
1326          * When the eeprom indicates SW_DIVERSITY use HW_DIVERSITY instead.
1327          * I am not 100% sure about this, but the legacy drivers do not
1328          * indicate antenna swapping in software is required when
1329          * diversity is enabled.
1330          */
1331         if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
1332                 rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY;
1333         if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
1334                 rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY;
1335
1336         /*
1337          * Store led mode, for correct led behaviour.
1338          */
1339         rt2x00dev->led_mode =
1340             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_LED_MODE);
1341
1342         /*
1343          * Check if the BBP tuning should be disabled.
1344          */
1345         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
1346         if (rt2x00_get_field16(eeprom, EEPROM_NIC_DYN_BBP_TUNE))
1347                 __set_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags);
1348
1349         /*
1350          * Read the RSSI <-> dBm offset information.
1351          */
1352         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &eeprom);
1353         rt2x00dev->rssi_offset =
1354             rt2x00_get_field16(eeprom, EEPROM_CALIBRATE_OFFSET_RSSI);
1355
1356         return 0;
1357 }
1358
1359 /*
1360  * RF value list for RF2522
1361  * Supports: 2.4 GHz
1362  */
1363 static const struct rf_channel rf_vals_bg_2522[] = {
1364         { 1,  0x00002050, 0x000c1fda, 0x00000101, 0 },
1365         { 2,  0x00002050, 0x000c1fee, 0x00000101, 0 },
1366         { 3,  0x00002050, 0x000c2002, 0x00000101, 0 },
1367         { 4,  0x00002050, 0x000c2016, 0x00000101, 0 },
1368         { 5,  0x00002050, 0x000c202a, 0x00000101, 0 },
1369         { 6,  0x00002050, 0x000c203e, 0x00000101, 0 },
1370         { 7,  0x00002050, 0x000c2052, 0x00000101, 0 },
1371         { 8,  0x00002050, 0x000c2066, 0x00000101, 0 },
1372         { 9,  0x00002050, 0x000c207a, 0x00000101, 0 },
1373         { 10, 0x00002050, 0x000c208e, 0x00000101, 0 },
1374         { 11, 0x00002050, 0x000c20a2, 0x00000101, 0 },
1375         { 12, 0x00002050, 0x000c20b6, 0x00000101, 0 },
1376         { 13, 0x00002050, 0x000c20ca, 0x00000101, 0 },
1377         { 14, 0x00002050, 0x000c20fa, 0x00000101, 0 },
1378 };
1379
1380 /*
1381  * RF value list for RF2523
1382  * Supports: 2.4 GHz
1383  */
1384 static const struct rf_channel rf_vals_bg_2523[] = {
1385         { 1,  0x00022010, 0x00000c9e, 0x000e0111, 0x00000a1b },
1386         { 2,  0x00022010, 0x00000ca2, 0x000e0111, 0x00000a1b },
1387         { 3,  0x00022010, 0x00000ca6, 0x000e0111, 0x00000a1b },
1388         { 4,  0x00022010, 0x00000caa, 0x000e0111, 0x00000a1b },
1389         { 5,  0x00022010, 0x00000cae, 0x000e0111, 0x00000a1b },
1390         { 6,  0x00022010, 0x00000cb2, 0x000e0111, 0x00000a1b },
1391         { 7,  0x00022010, 0x00000cb6, 0x000e0111, 0x00000a1b },
1392         { 8,  0x00022010, 0x00000cba, 0x000e0111, 0x00000a1b },
1393         { 9,  0x00022010, 0x00000cbe, 0x000e0111, 0x00000a1b },
1394         { 10, 0x00022010, 0x00000d02, 0x000e0111, 0x00000a1b },
1395         { 11, 0x00022010, 0x00000d06, 0x000e0111, 0x00000a1b },
1396         { 12, 0x00022010, 0x00000d0a, 0x000e0111, 0x00000a1b },
1397         { 13, 0x00022010, 0x00000d0e, 0x000e0111, 0x00000a1b },
1398         { 14, 0x00022010, 0x00000d1a, 0x000e0111, 0x00000a03 },
1399 };
1400
1401 /*
1402  * RF value list for RF2524
1403  * Supports: 2.4 GHz
1404  */
1405 static const struct rf_channel rf_vals_bg_2524[] = {
1406         { 1,  0x00032020, 0x00000c9e, 0x00000101, 0x00000a1b },
1407         { 2,  0x00032020, 0x00000ca2, 0x00000101, 0x00000a1b },
1408         { 3,  0x00032020, 0x00000ca6, 0x00000101, 0x00000a1b },
1409         { 4,  0x00032020, 0x00000caa, 0x00000101, 0x00000a1b },
1410         { 5,  0x00032020, 0x00000cae, 0x00000101, 0x00000a1b },
1411         { 6,  0x00032020, 0x00000cb2, 0x00000101, 0x00000a1b },
1412         { 7,  0x00032020, 0x00000cb6, 0x00000101, 0x00000a1b },
1413         { 8,  0x00032020, 0x00000cba, 0x00000101, 0x00000a1b },
1414         { 9,  0x00032020, 0x00000cbe, 0x00000101, 0x00000a1b },
1415         { 10, 0x00032020, 0x00000d02, 0x00000101, 0x00000a1b },
1416         { 11, 0x00032020, 0x00000d06, 0x00000101, 0x00000a1b },
1417         { 12, 0x00032020, 0x00000d0a, 0x00000101, 0x00000a1b },
1418         { 13, 0x00032020, 0x00000d0e, 0x00000101, 0x00000a1b },
1419         { 14, 0x00032020, 0x00000d1a, 0x00000101, 0x00000a03 },
1420 };
1421
1422 /*
1423  * RF value list for RF2525
1424  * Supports: 2.4 GHz
1425  */
1426 static const struct rf_channel rf_vals_bg_2525[] = {
1427         { 1,  0x00022020, 0x00080c9e, 0x00060111, 0x00000a1b },
1428         { 2,  0x00022020, 0x00080ca2, 0x00060111, 0x00000a1b },
1429         { 3,  0x00022020, 0x00080ca6, 0x00060111, 0x00000a1b },
1430         { 4,  0x00022020, 0x00080caa, 0x00060111, 0x00000a1b },
1431         { 5,  0x00022020, 0x00080cae, 0x00060111, 0x00000a1b },
1432         { 6,  0x00022020, 0x00080cb2, 0x00060111, 0x00000a1b },
1433         { 7,  0x00022020, 0x00080cb6, 0x00060111, 0x00000a1b },
1434         { 8,  0x00022020, 0x00080cba, 0x00060111, 0x00000a1b },
1435         { 9,  0x00022020, 0x00080cbe, 0x00060111, 0x00000a1b },
1436         { 10, 0x00022020, 0x00080d02, 0x00060111, 0x00000a1b },
1437         { 11, 0x00022020, 0x00080d06, 0x00060111, 0x00000a1b },
1438         { 12, 0x00022020, 0x00080d0a, 0x00060111, 0x00000a1b },
1439         { 13, 0x00022020, 0x00080d0e, 0x00060111, 0x00000a1b },
1440         { 14, 0x00022020, 0x00080d1a, 0x00060111, 0x00000a03 },
1441 };
1442
1443 /*
1444  * RF value list for RF2525e
1445  * Supports: 2.4 GHz
1446  */
1447 static const struct rf_channel rf_vals_bg_2525e[] = {
1448         { 1,  0x00022010, 0x0000089a, 0x00060111, 0x00000e1b },
1449         { 2,  0x00022010, 0x0000089e, 0x00060111, 0x00000e07 },
1450         { 3,  0x00022010, 0x0000089e, 0x00060111, 0x00000e1b },
1451         { 4,  0x00022010, 0x000008a2, 0x00060111, 0x00000e07 },
1452         { 5,  0x00022010, 0x000008a2, 0x00060111, 0x00000e1b },
1453         { 6,  0x00022010, 0x000008a6, 0x00060111, 0x00000e07 },
1454         { 7,  0x00022010, 0x000008a6, 0x00060111, 0x00000e1b },
1455         { 8,  0x00022010, 0x000008aa, 0x00060111, 0x00000e07 },
1456         { 9,  0x00022010, 0x000008aa, 0x00060111, 0x00000e1b },
1457         { 10, 0x00022010, 0x000008ae, 0x00060111, 0x00000e07 },
1458         { 11, 0x00022010, 0x000008ae, 0x00060111, 0x00000e1b },
1459         { 12, 0x00022010, 0x000008b2, 0x00060111, 0x00000e07 },
1460         { 13, 0x00022010, 0x000008b2, 0x00060111, 0x00000e1b },
1461         { 14, 0x00022010, 0x000008b6, 0x00060111, 0x00000e23 },
1462 };
1463
1464 /*
1465  * RF value list for RF5222
1466  * Supports: 2.4 GHz & 5.2 GHz
1467  */
1468 static const struct rf_channel rf_vals_5222[] = {
1469         { 1,  0x00022020, 0x00001136, 0x00000101, 0x00000a0b },
1470         { 2,  0x00022020, 0x0000113a, 0x00000101, 0x00000a0b },
1471         { 3,  0x00022020, 0x0000113e, 0x00000101, 0x00000a0b },
1472         { 4,  0x00022020, 0x00001182, 0x00000101, 0x00000a0b },
1473         { 5,  0x00022020, 0x00001186, 0x00000101, 0x00000a0b },
1474         { 6,  0x00022020, 0x0000118a, 0x00000101, 0x00000a0b },
1475         { 7,  0x00022020, 0x0000118e, 0x00000101, 0x00000a0b },
1476         { 8,  0x00022020, 0x00001192, 0x00000101, 0x00000a0b },
1477         { 9,  0x00022020, 0x00001196, 0x00000101, 0x00000a0b },
1478         { 10, 0x00022020, 0x0000119a, 0x00000101, 0x00000a0b },
1479         { 11, 0x00022020, 0x0000119e, 0x00000101, 0x00000a0b },
1480         { 12, 0x00022020, 0x000011a2, 0x00000101, 0x00000a0b },
1481         { 13, 0x00022020, 0x000011a6, 0x00000101, 0x00000a0b },
1482         { 14, 0x00022020, 0x000011ae, 0x00000101, 0x00000a1b },
1483
1484         /* 802.11 UNI / HyperLan 2 */
1485         { 36, 0x00022010, 0x00018896, 0x00000101, 0x00000a1f },
1486         { 40, 0x00022010, 0x0001889a, 0x00000101, 0x00000a1f },
1487         { 44, 0x00022010, 0x0001889e, 0x00000101, 0x00000a1f },
1488         { 48, 0x00022010, 0x000188a2, 0x00000101, 0x00000a1f },
1489         { 52, 0x00022010, 0x000188a6, 0x00000101, 0x00000a1f },
1490         { 66, 0x00022010, 0x000188aa, 0x00000101, 0x00000a1f },
1491         { 60, 0x00022010, 0x000188ae, 0x00000101, 0x00000a1f },
1492         { 64, 0x00022010, 0x000188b2, 0x00000101, 0x00000a1f },
1493
1494         /* 802.11 HyperLan 2 */
1495         { 100, 0x00022010, 0x00008802, 0x00000101, 0x00000a0f },
1496         { 104, 0x00022010, 0x00008806, 0x00000101, 0x00000a0f },
1497         { 108, 0x00022010, 0x0000880a, 0x00000101, 0x00000a0f },
1498         { 112, 0x00022010, 0x0000880e, 0x00000101, 0x00000a0f },
1499         { 116, 0x00022010, 0x00008812, 0x00000101, 0x00000a0f },
1500         { 120, 0x00022010, 0x00008816, 0x00000101, 0x00000a0f },
1501         { 124, 0x00022010, 0x0000881a, 0x00000101, 0x00000a0f },
1502         { 128, 0x00022010, 0x0000881e, 0x00000101, 0x00000a0f },
1503         { 132, 0x00022010, 0x00008822, 0x00000101, 0x00000a0f },
1504         { 136, 0x00022010, 0x00008826, 0x00000101, 0x00000a0f },
1505
1506         /* 802.11 UNII */
1507         { 140, 0x00022010, 0x0000882a, 0x00000101, 0x00000a0f },
1508         { 149, 0x00022020, 0x000090a6, 0x00000101, 0x00000a07 },
1509         { 153, 0x00022020, 0x000090ae, 0x00000101, 0x00000a07 },
1510         { 157, 0x00022020, 0x000090b6, 0x00000101, 0x00000a07 },
1511         { 161, 0x00022020, 0x000090be, 0x00000101, 0x00000a07 },
1512 };
1513
1514 static void rt2500usb_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
1515 {
1516         struct hw_mode_spec *spec = &rt2x00dev->spec;
1517         u8 *txpower;
1518         unsigned int i;
1519
1520         /*
1521          * Initialize all hw fields.
1522          */
1523         rt2x00dev->hw->flags =
1524             IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
1525             IEEE80211_HW_RX_INCLUDES_FCS |
1526             IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
1527         rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE;
1528         rt2x00dev->hw->max_signal = MAX_SIGNAL;
1529         rt2x00dev->hw->max_rssi = MAX_RX_SSI;
1530         rt2x00dev->hw->queues = 2;
1531
1532         SET_IEEE80211_DEV(rt2x00dev->hw, &rt2x00dev_usb(rt2x00dev)->dev);
1533         SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
1534                                 rt2x00_eeprom_addr(rt2x00dev,
1535                                                    EEPROM_MAC_ADDR_0));
1536
1537         /*
1538          * Convert tx_power array in eeprom.
1539          */
1540         txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_START);
1541         for (i = 0; i < 14; i++)
1542                 txpower[i] = TXPOWER_FROM_DEV(txpower[i]);
1543
1544         /*
1545          * Initialize hw_mode information.
1546          */
1547         spec->num_modes = 2;
1548         spec->num_rates = 12;
1549         spec->tx_power_a = NULL;
1550         spec->tx_power_bg = txpower;
1551         spec->tx_power_default = DEFAULT_TXPOWER;
1552
1553         if (rt2x00_rf(&rt2x00dev->chip, RF2522)) {
1554                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2522);
1555                 spec->channels = rf_vals_bg_2522;
1556         } else if (rt2x00_rf(&rt2x00dev->chip, RF2523)) {
1557                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2523);
1558                 spec->channels = rf_vals_bg_2523;
1559         } else if (rt2x00_rf(&rt2x00dev->chip, RF2524)) {
1560                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2524);
1561                 spec->channels = rf_vals_bg_2524;
1562         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525)) {
1563                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525);
1564                 spec->channels = rf_vals_bg_2525;
1565         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
1566                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525e);
1567                 spec->channels = rf_vals_bg_2525e;
1568         } else if (rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1569                 spec->num_channels = ARRAY_SIZE(rf_vals_5222);
1570                 spec->channels = rf_vals_5222;
1571                 spec->num_modes = 3;
1572         }
1573 }
1574
1575 static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
1576 {
1577         int retval;
1578
1579         /*
1580          * Allocate eeprom data.
1581          */
1582         retval = rt2500usb_validate_eeprom(rt2x00dev);
1583         if (retval)
1584                 return retval;
1585
1586         retval = rt2500usb_init_eeprom(rt2x00dev);
1587         if (retval)
1588                 return retval;
1589
1590         /*
1591          * Initialize hw specifications.
1592          */
1593         rt2500usb_probe_hw_mode(rt2x00dev);
1594
1595         /*
1596          * This device requires the beacon ring
1597          */
1598         __set_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
1599
1600         /*
1601          * Set the rssi offset.
1602          */
1603         rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;
1604
1605         return 0;
1606 }
1607
1608 /*
1609  * IEEE80211 stack callback functions.
1610  */
1611 static void rt2500usb_configure_filter(struct ieee80211_hw *hw,
1612                                        unsigned int changed_flags,
1613                                        unsigned int *total_flags,
1614                                        int mc_count,
1615                                        struct dev_addr_list *mc_list)
1616 {
1617         struct rt2x00_dev *rt2x00dev = hw->priv;
1618         struct interface *intf = &rt2x00dev->interface;
1619         u16 reg;
1620
1621         /*
1622          * Mask off any flags we are going to ignore from
1623          * the total_flags field.
1624          */
1625         *total_flags &=
1626             FIF_ALLMULTI |
1627             FIF_FCSFAIL |
1628             FIF_PLCPFAIL |
1629             FIF_CONTROL |
1630             FIF_OTHER_BSS |
1631             FIF_PROMISC_IN_BSS;
1632
1633         /*
1634          * Apply some rules to the filters:
1635          * - Some filters imply different filters to be set.
1636          * - Some things we can't filter out at all.
1637          * - Some filters are set based on interface type.
1638          */
1639         if (mc_count)
1640                 *total_flags |= FIF_ALLMULTI;
1641         if (*total_flags & FIF_OTHER_BSS ||
1642             *total_flags & FIF_PROMISC_IN_BSS)
1643                 *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;
1644         if (is_interface_type(intf, IEEE80211_IF_TYPE_AP))
1645                 *total_flags |= FIF_PROMISC_IN_BSS;
1646
1647         /*
1648          * Check if there is any work left for us.
1649          */
1650         if (intf->filter == *total_flags)
1651                 return;
1652         intf->filter = *total_flags;
1653
1654         /*
1655          * When in atomic context, reschedule and let rt2x00lib
1656          * call this function again.
1657          */
1658         if (in_atomic()) {
1659                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->filter_work);
1660                 return;
1661         }
1662
1663         /*
1664          * Start configuration steps.
1665          * Note that the version error will always be dropped
1666          * and broadcast frames will always be accepted since
1667          * there is no filter for it at this time.
1668          */
1669         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
1670         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CRC,
1671                            !(*total_flags & FIF_FCSFAIL));
1672         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_PHYSICAL,
1673                            !(*total_flags & FIF_PLCPFAIL));
1674         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CONTROL,
1675                            !(*total_flags & FIF_CONTROL));
1676         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_NOT_TO_ME,
1677                            !(*total_flags & FIF_PROMISC_IN_BSS));
1678         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_TODS,
1679                            !(*total_flags & FIF_PROMISC_IN_BSS));
1680         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_VERSION_ERROR, 1);
1681         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_MULTICAST,
1682                            !(*total_flags & FIF_ALLMULTI));
1683         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_BROADCAST, 0);
1684         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
1685 }
1686
1687 static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
1688                                    struct sk_buff *skb,
1689                                    struct ieee80211_tx_control *control)
1690 {
1691         struct rt2x00_dev *rt2x00dev = hw->priv;
1692         struct usb_device *usb_dev =
1693             interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
1694         struct data_ring *ring =
1695             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
1696         struct data_entry *beacon;
1697         struct data_entry *guardian;
1698         int pipe = usb_sndbulkpipe(usb_dev, 1);
1699         int length;
1700
1701         /*
1702          * Just in case the ieee80211 doesn't set this,
1703          * but we need this queue set for the descriptor
1704          * initialization.
1705          */
1706         control->queue = IEEE80211_TX_QUEUE_BEACON;
1707
1708         /*
1709          * Obtain 2 entries, one for the guardian byte,
1710          * the second for the actual beacon.
1711          */
1712         guardian = rt2x00_get_data_entry(ring);
1713         rt2x00_ring_index_inc(ring);
1714         beacon = rt2x00_get_data_entry(ring);
1715
1716         /*
1717          * First we create the beacon.
1718          */
1719         skb_push(skb, ring->desc_size);
1720         memset(skb->data, 0, ring->desc_size);
1721
1722         rt2x00lib_write_tx_desc(rt2x00dev, (__le32 *)skb->data,
1723                                 (struct ieee80211_hdr *)(skb->data +
1724                                                          ring->desc_size),
1725                                 skb->len - ring->desc_size, control);
1726
1727         length = rt2500usb_get_tx_data_len(rt2x00dev, skb);
1728
1729         usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
1730                           skb->data, length, rt2500usb_beacondone, beacon);
1731
1732         beacon->skb = skb;
1733
1734         /*
1735          * Second we need to create the guardian byte.
1736          * We only need a single byte, so lets recycle
1737          * the 'flags' field we are not using for beacons.
1738          */
1739         guardian->flags = 0;
1740         usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,
1741                           &guardian->flags, 1, rt2500usb_beacondone, guardian);
1742
1743         /*
1744          * Send out the guardian byte.
1745          */
1746         usb_submit_urb(guardian->priv, GFP_ATOMIC);
1747
1748         /*
1749          * Enable beacon generation.
1750          */
1751         rt2500usb_kick_tx_queue(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
1752
1753         return 0;
1754 }
1755
1756 static const struct ieee80211_ops rt2500usb_mac80211_ops = {
1757         .tx                     = rt2x00mac_tx,
1758         .start                  = rt2x00mac_start,
1759         .stop                   = rt2x00mac_stop,
1760         .add_interface          = rt2x00mac_add_interface,
1761         .remove_interface       = rt2x00mac_remove_interface,
1762         .config                 = rt2x00mac_config,
1763         .config_interface       = rt2x00mac_config_interface,
1764         .configure_filter       = rt2500usb_configure_filter,
1765         .get_stats              = rt2x00mac_get_stats,
1766         .erp_ie_changed         = rt2x00mac_erp_ie_changed,
1767         .conf_tx                = rt2x00mac_conf_tx,
1768         .get_tx_stats           = rt2x00mac_get_tx_stats,
1769         .beacon_update          = rt2500usb_beacon_update,
1770 };
1771
1772 static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
1773         .probe_hw               = rt2500usb_probe_hw,
1774         .initialize             = rt2x00usb_initialize,
1775         .uninitialize           = rt2x00usb_uninitialize,
1776         .set_device_state       = rt2500usb_set_device_state,
1777         .link_stats             = rt2500usb_link_stats,
1778         .reset_tuner            = rt2500usb_reset_tuner,
1779         .link_tuner             = rt2500usb_link_tuner,
1780         .write_tx_desc          = rt2500usb_write_tx_desc,
1781         .write_tx_data          = rt2x00usb_write_tx_data,
1782         .get_tx_data_len        = rt2500usb_get_tx_data_len,
1783         .kick_tx_queue          = rt2500usb_kick_tx_queue,
1784         .fill_rxdone            = rt2500usb_fill_rxdone,
1785         .config_mac_addr        = rt2500usb_config_mac_addr,
1786         .config_bssid           = rt2500usb_config_bssid,
1787         .config_type            = rt2500usb_config_type,
1788         .config_preamble        = rt2500usb_config_preamble,
1789         .config                 = rt2500usb_config,
1790 };
1791
1792 static const struct rt2x00_ops rt2500usb_ops = {
1793         .name           = DRV_NAME,
1794         .rxd_size       = RXD_DESC_SIZE,
1795         .txd_size       = TXD_DESC_SIZE,
1796         .eeprom_size    = EEPROM_SIZE,
1797         .rf_size        = RF_SIZE,
1798         .lib            = &rt2500usb_rt2x00_ops,
1799         .hw             = &rt2500usb_mac80211_ops,
1800 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1801         .debugfs        = &rt2500usb_rt2x00debug,
1802 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1803 };
1804
1805 /*
1806  * rt2500usb module information.
1807  */
1808 static struct usb_device_id rt2500usb_device_table[] = {
1809         /* ASUS */
1810         { USB_DEVICE(0x0b05, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1811         { USB_DEVICE(0x0b05, 0x1707), USB_DEVICE_DATA(&rt2500usb_ops) },
1812         /* Belkin */
1813         { USB_DEVICE(0x050d, 0x7050), USB_DEVICE_DATA(&rt2500usb_ops) },
1814         { USB_DEVICE(0x050d, 0x7051), USB_DEVICE_DATA(&rt2500usb_ops) },
1815         { USB_DEVICE(0x050d, 0x705a), USB_DEVICE_DATA(&rt2500usb_ops) },
1816         /* Cisco Systems */
1817         { USB_DEVICE(0x13b1, 0x000d), USB_DEVICE_DATA(&rt2500usb_ops) },
1818         { USB_DEVICE(0x13b1, 0x0011), USB_DEVICE_DATA(&rt2500usb_ops) },
1819         { USB_DEVICE(0x13b1, 0x001a), USB_DEVICE_DATA(&rt2500usb_ops) },
1820         /* Conceptronic */
1821         { USB_DEVICE(0x14b2, 0x3c02), USB_DEVICE_DATA(&rt2500usb_ops) },
1822         /* D-LINK */
1823         { USB_DEVICE(0x2001, 0x3c00), USB_DEVICE_DATA(&rt2500usb_ops) },
1824         /* Gigabyte */
1825         { USB_DEVICE(0x1044, 0x8001), USB_DEVICE_DATA(&rt2500usb_ops) },
1826         { USB_DEVICE(0x1044, 0x8007), USB_DEVICE_DATA(&rt2500usb_ops) },
1827         /* Hercules */
1828         { USB_DEVICE(0x06f8, 0xe000), USB_DEVICE_DATA(&rt2500usb_ops) },
1829         /* Melco */
1830         { USB_DEVICE(0x0411, 0x0066), USB_DEVICE_DATA(&rt2500usb_ops) },
1831         { USB_DEVICE(0x0411, 0x0067), USB_DEVICE_DATA(&rt2500usb_ops) },
1832         { USB_DEVICE(0x0411, 0x008b), USB_DEVICE_DATA(&rt2500usb_ops) },
1833         { USB_DEVICE(0x0411, 0x0097), USB_DEVICE_DATA(&rt2500usb_ops) },
1834
1835         /* MSI */
1836         { USB_DEVICE(0x0db0, 0x6861), USB_DEVICE_DATA(&rt2500usb_ops) },
1837         { USB_DEVICE(0x0db0, 0x6865), USB_DEVICE_DATA(&rt2500usb_ops) },
1838         { USB_DEVICE(0x0db0, 0x6869), USB_DEVICE_DATA(&rt2500usb_ops) },
1839         /* Ralink */
1840         { USB_DEVICE(0x148f, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1841         { USB_DEVICE(0x148f, 0x2570), USB_DEVICE_DATA(&rt2500usb_ops) },
1842         { USB_DEVICE(0x148f, 0x2573), USB_DEVICE_DATA(&rt2500usb_ops) },
1843         { USB_DEVICE(0x148f, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1844         /* Siemens */
1845         { USB_DEVICE(0x0681, 0x3c06), USB_DEVICE_DATA(&rt2500usb_ops) },
1846         /* SMC */
1847         { USB_DEVICE(0x0707, 0xee13), USB_DEVICE_DATA(&rt2500usb_ops) },
1848         /* Spairon */
1849         { USB_DEVICE(0x114b, 0x0110), USB_DEVICE_DATA(&rt2500usb_ops) },
1850         /* Trust */
1851         { USB_DEVICE(0x0eb0, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1852         /* Zinwell */
1853         { USB_DEVICE(0x5a57, 0x0260), USB_DEVICE_DATA(&rt2500usb_ops) },
1854         { 0, }
1855 };
1856
1857 MODULE_AUTHOR(DRV_PROJECT);
1858 MODULE_VERSION(DRV_VERSION);
1859 MODULE_DESCRIPTION("Ralink RT2500 USB Wireless LAN driver.");
1860 MODULE_SUPPORTED_DEVICE("Ralink RT2570 USB chipset based cards");
1861 MODULE_DEVICE_TABLE(usb, rt2500usb_device_table);
1862 MODULE_LICENSE("GPL");
1863
1864 static struct usb_driver rt2500usb_driver = {
1865         .name           = DRV_NAME,
1866         .id_table       = rt2500usb_device_table,
1867         .probe          = rt2x00usb_probe,
1868         .disconnect     = rt2x00usb_disconnect,
1869         .suspend        = rt2x00usb_suspend,
1870         .resume         = rt2x00usb_resume,
1871 };
1872
1873 static int __init rt2500usb_init(void)
1874 {
1875         return usb_register(&rt2500usb_driver);
1876 }
1877
1878 static void __exit rt2500usb_exit(void)
1879 {
1880         usb_deregister(&rt2500usb_driver);
1881 }
1882
1883 module_init(rt2500usb_init);
1884 module_exit(rt2500usb_exit);