err.no Git - linux-2.6/blob - 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 #include <linux/delay.h>
  28 #include <linux/etherdevice.h>
  29 #include <linux/init.h>
  30 #include <linux/kernel.h>
  31 #include <linux/module.h>
  32 #include <linux/usb.h>
  33
  34 #include "rt2x00.h"
  35 #include "rt2x00usb.h"
  36 #include "rt2500usb.h"
  37
  38 /*
  39  * Register access.
  40  * All access to the CSR registers will go through the methods
  41  * rt2500usb_register_read and rt2500usb_register_write.
  42  * BBP and RF register require indirect register access,
  43  * and use the CSR registers BBPCSR and RFCSR to achieve this.
  44  * These indirect registers work with busy bits,
  45  * and we will try maximal REGISTER_BUSY_COUNT times to access
  46  * the register while taking a REGISTER_BUSY_DELAY us delay
  47  * between each attampt. When the busy bit is still set at that time,
  48  * the access attempt is considered to have failed,
  49  * and we will print an error.
  50  * If the usb_cache_mutex is already held then the _lock variants must
  51  * be used instead.
  52  */
  53 static inline void rt2500usb_register_read(struct rt2x00_dev *rt2x00dev,
  54                                            const unsigned int offset,
  55                                            u16 *value)
  56 {
  57         __le16 reg;
  58         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
  59                                       USB_VENDOR_REQUEST_IN, offset,
  60                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
  61         *value = le16_to_cpu(reg);
  62 }
  63
  64 static inline void rt2500usb_register_read_lock(struct rt2x00_dev *rt2x00dev,
  65                                                 const unsigned int offset,
  66                                                 u16 *value)
  67 {
  68         __le16 reg;
  69         rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_READ,
  70                                        USB_VENDOR_REQUEST_IN, offset,
  71                                        &reg, sizeof(u16), REGISTER_TIMEOUT);
  72         *value = le16_to_cpu(reg);
  73 }
  74
  75 static inline void rt2500usb_register_multiread(struct rt2x00_dev *rt2x00dev,
  76                                                 const unsigned int offset,
  77                                                 void *value, const u16 length)
  78 {
  79         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
  80         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
  81                                       USB_VENDOR_REQUEST_IN, offset,
  82                                       value, length, timeout);
  83 }
  84
  85 static inline void rt2500usb_register_write(struct rt2x00_dev *rt2x00dev,
  86                                             const unsigned int offset,
  87                                             u16 value)
  88 {
  89         __le16 reg = cpu_to_le16(value);
  90         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
  91                                       USB_VENDOR_REQUEST_OUT, offset,
  92                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
  93 }
  94
  95 static inline void rt2500usb_register_write_lock(struct rt2x00_dev *rt2x00dev,
  96                                                  const unsigned int offset,
  97                                                  u16 value)
  98 {
  99         __le16 reg = cpu_to_le16(value);
 100         rt2x00usb_vendor_req_buff_lock(rt2x00dev, USB_MULTI_WRITE,
 101                                        USB_VENDOR_REQUEST_OUT, offset,
 102                                        &reg, sizeof(u16), REGISTER_TIMEOUT);
 103 }
 104
 105 static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
 106                                                  const unsigned int offset,
 107                                                  void *value, const u16 length)
 108 {
 109         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
 110         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
 111                                       USB_VENDOR_REQUEST_OUT, offset,
 112                                       value, length, timeout);
 113 }
 114
 115 static u16 rt2500usb_bbp_check(struct rt2x00_dev *rt2x00dev)
 116 {
 117         u16 reg;
 118         unsigned int i;
 119
 120         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 121                 rt2500usb_register_read_lock(rt2x00dev, PHY_CSR8, &reg);
 122                 if (!rt2x00_get_field16(reg, PHY_CSR8_BUSY))
 123                         break;
 124                 udelay(REGISTER_BUSY_DELAY);
 125         }
 126
 127         return reg;
 128 }
 129
 130 static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev,
 131                                 const unsigned int word, const u8 value)
 132 {
 133         u16 reg;
 134
 135         mutex_lock(&rt2x00dev->usb_cache_mutex);
 136
 137         /*
 138          * Wait until the BBP becomes ready.
 139          */
 140         reg = rt2500usb_bbp_check(rt2x00dev);
 141         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 142                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Write failed.\n");
 143                 mutex_unlock(&rt2x00dev->usb_cache_mutex);
 144                 return;
 145         }
 146
 147         /*
 148          * Write the data into the BBP.
 149          */
 150         reg = 0;
 151         rt2x00_set_field16(&reg, PHY_CSR7_DATA, value);
 152         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
 153         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 0);
 154
 155         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);
 156
 157         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 158 }
 159
 160 static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev,
 161                                const unsigned int word, u8 *value)
 162 {
 163         u16 reg;
 164
 165         mutex_lock(&rt2x00dev->usb_cache_mutex);
 166
 167         /*
 168          * Wait until the BBP becomes ready.
 169          */
 170         reg = rt2500usb_bbp_check(rt2x00dev);
 171         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 172                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
 173                 return;
 174         }
 175
 176         /*
 177          * Write the request into the BBP.
 178          */
 179         reg = 0;
 180         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
 181         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 1);
 182
 183         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR7, reg);
 184
 185         /*
 186          * Wait until the BBP becomes ready.
 187          */
 188         reg = rt2500usb_bbp_check(rt2x00dev);
 189         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
 190                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
 191                 *value = 0xff;
 192                 mutex_unlock(&rt2x00dev->usb_cache_mutex);
 193                 return;
 194         }
 195
 196         rt2500usb_register_read_lock(rt2x00dev, PHY_CSR7, &reg);
 197         *value = rt2x00_get_field16(reg, PHY_CSR7_DATA);
 198
 199         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 200 }
 201
 202 static void rt2500usb_rf_write(struct rt2x00_dev *rt2x00dev,
 203                                const unsigned int word, const u32 value)
 204 {
 205         u16 reg;
 206         unsigned int i;
 207
 208         if (!word)
 209                 return;
 210
 211         mutex_lock(&rt2x00dev->usb_cache_mutex);
 212
 213         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 214                 rt2500usb_register_read_lock(rt2x00dev, PHY_CSR10, &reg);
 215                 if (!rt2x00_get_field16(reg, PHY_CSR10_RF_BUSY))
 216                         goto rf_write;
 217                 udelay(REGISTER_BUSY_DELAY);
 218         }
 219
 220         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 221         ERROR(rt2x00dev, "PHY_CSR10 register busy. Write failed.\n");
 222         return;
 223
 224 rf_write:
 225         reg = 0;
 226         rt2x00_set_field16(&reg, PHY_CSR9_RF_VALUE, value);
 227         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR9, reg);
 228
 229         reg = 0;
 230         rt2x00_set_field16(&reg, PHY_CSR10_RF_VALUE, value >> 16);
 231         rt2x00_set_field16(&reg, PHY_CSR10_RF_NUMBER_OF_BITS, 20);
 232         rt2x00_set_field16(&reg, PHY_CSR10_RF_IF_SELECT, 0);
 233         rt2x00_set_field16(&reg, PHY_CSR10_RF_BUSY, 1);
 234
 235         rt2500usb_register_write_lock(rt2x00dev, PHY_CSR10, reg);
 236         rt2x00_rf_write(rt2x00dev, word, value);
 237
 238         mutex_unlock(&rt2x00dev->usb_cache_mutex);
 239 }
 240
 241 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 242 #define CSR_OFFSET(__word)      ( CSR_REG_BASE + ((__word) * sizeof(u16)) )
 243
 244 static void rt2500usb_read_csr(struct rt2x00_dev *rt2x00dev,
 245                                const unsigned int word, u32 *data)
 246 {
 247         rt2500usb_register_read(rt2x00dev, CSR_OFFSET(word), (u16 *) data);
 248 }
 249
 250 static void rt2500usb_write_csr(struct rt2x00_dev *rt2x00dev,
 251                                 const unsigned int word, u32 data)
 252 {
 253         rt2500usb_register_write(rt2x00dev, CSR_OFFSET(word), data);
 254 }
 255
 256 static const struct rt2x00debug rt2500usb_rt2x00debug = {
 257         .owner  = THIS_MODULE,
 258         .csr    = {
 259                 .read           = rt2500usb_read_csr,
 260                 .write          = rt2500usb_write_csr,
 261                 .word_size      = sizeof(u16),
 262                 .word_count     = CSR_REG_SIZE / sizeof(u16),
 263         },
 264         .eeprom = {
 265                 .read           = rt2x00_eeprom_read,
 266                 .write          = rt2x00_eeprom_write,
 267                 .word_size      = sizeof(u16),
 268                 .word_count     = EEPROM_SIZE / sizeof(u16),
 269         },
 270         .bbp    = {
 271                 .read           = rt2500usb_bbp_read,
 272                 .write          = rt2500usb_bbp_write,
 273                 .word_size      = sizeof(u8),
 274                 .word_count     = BBP_SIZE / sizeof(u8),
 275         },
 276         .rf     = {
 277                 .read           = rt2x00_rf_read,
 278                 .write          = rt2500usb_rf_write,
 279                 .word_size      = sizeof(u32),
 280                 .word_count     = RF_SIZE / sizeof(u32),
 281         },
 282 };
 283 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
 284
 285 /*
 286  * Configuration handlers.
 287  */
 288 static void rt2500usb_config_mac_addr(struct rt2x00_dev *rt2x00dev,
 289                                       __le32 *mac)
 290 {
 291         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, mac,
 292                                       (3 * sizeof(__le16)));
 293 }
 294
 295 static void rt2500usb_config_bssid(struct rt2x00_dev *rt2x00dev,
 296                                    __le32 *bssid)
 297 {
 298         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, bssid,
 299                                       (3 * sizeof(__le16)));
 300 }
 301
 302 static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
 303                                   const int tsf_sync)
 304 {
 305         u16 reg;
 306
 307         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
 308
 309         /*
 310          * Enable beacon config
 311          */
 312         rt2500usb_register_read(rt2x00dev, TXRX_CSR20, &reg);
 313         rt2x00_set_field16(&reg, TXRX_CSR20_OFFSET,
 314                            (PREAMBLE + get_duration(IEEE80211_HEADER, 20)) >> 6);
 315         if (type == IEEE80211_IF_TYPE_STA)
 316                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 0);
 317         else
 318                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 2);
 319         rt2500usb_register_write(rt2x00dev, TXRX_CSR20, reg);
 320
 321         /*
 322          * Enable synchronisation.
 323          */
 324         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
 325         rt2x00_set_field16(&reg, TXRX_CSR18_OFFSET, 0);
 326         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 327
 328         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
 329         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 1);
 330         rt2x00_set_field16(&reg, TXRX_CSR19_TBCN,
 331                            (tsf_sync == TSF_SYNC_BEACON));
 332         rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 0);
 333         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, tsf_sync);
 334         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
 335 }
 336
 337 static void rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
 338                                       const int short_preamble,
 339                                       const int ack_timeout,
 340                                       const int ack_consume_time)
 341 {
 342         u16 reg;
 343
 344         /*
 345          * When in atomic context, reschedule and let rt2x00lib
 346          * call this function again.
 347          */
 348         if (in_atomic()) {
 349                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
 350                 return;
 351         }
 352
 353         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
 354         rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
 355         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 356
 357         rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
 358         rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
 359                            !!short_preamble);
 360         rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
 361 }
 362
 363 static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
 364                                      const int phymode,
 365                                      const int basic_rate_mask)
 366 {
 367         rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
 368
 369         if (phymode == HWMODE_B) {
 370                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x000b);
 371                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x0040);
 372         } else {
 373                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0005);
 374                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x016c);
 375         }
 376 }
 377
 378 static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
 379                                      struct rf_channel *rf, const int txpower)
 380 {
 381         /*
 382          * Set TXpower.
 383          */
 384         rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 385
 386         /*
 387          * For RT2525E we should first set the channel to half band higher.
 388          */
 389         if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
 390                 static const u32 vals[] = {
 391                         0x000008aa, 0x000008ae, 0x000008ae, 0x000008b2,
 392                         0x000008b2, 0x000008b6, 0x000008b6, 0x000008ba,
 393                         0x000008ba, 0x000008be, 0x000008b7, 0x00000902,
 394                         0x00000902, 0x00000906
 395                 };
 396
 397                 rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
 398                 if (rf->rf4)
 399                         rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 400         }
 401
 402         rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
 403         rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
 404         rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
 405         if (rf->rf4)
 406                 rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
 407 }
 408
 409 static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 410                                      const int txpower)
 411 {
 412         u32 rf3;
 413
 414         rt2x00_rf_read(rt2x00dev, 3, &rf3);
 415         rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 416         rt2500usb_rf_write(rt2x00dev, 3, rf3);
 417 }
 418
 419 static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
 420                                      struct antenna_setup *ant)
 421 {
 422         u8 r2;
 423         u8 r14;
 424         u16 csr5;
 425         u16 csr6;
 426
 427         rt2500usb_bbp_read(rt2x00dev, 2, &r2);
 428         rt2500usb_bbp_read(rt2x00dev, 14, &r14);
 429         rt2500usb_register_read(rt2x00dev, PHY_CSR5, &csr5);
 430         rt2500usb_register_read(rt2x00dev, PHY_CSR6, &csr6);
 431
 432         /*
 433          * Configure the TX antenna.
 434          */
 435         switch (ant->tx) {
 436         case ANTENNA_HW_DIVERSITY:
 437                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 1);
 438                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 1);
 439                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 1);
 440                 break;
 441         case ANTENNA_A:
 442                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
 443                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 0);
 444                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 0);
 445                 break;
 446         case ANTENNA_SW_DIVERSITY:
 447                 /*
 448                  * NOTE: We should never come here because rt2x00lib is
 449                  * supposed to catch this and send us the correct antenna
 450                  * explicitely. However we are nog going to bug about this.
 451                  * Instead, just default to antenna B.
 452                  */
 453         case ANTENNA_B:
 454                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
 455                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 2);
 456                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 2);
 457                 break;
 458         }
 459
 460         /*
 461          * Configure the RX antenna.
 462          */
 463         switch (ant->rx) {
 464         case ANTENNA_HW_DIVERSITY:
 465                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 1);
 466                 break;
 467         case ANTENNA_A:
 468                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
 469                 break;
 470         case ANTENNA_SW_DIVERSITY:
 471                 /*
 472                  * NOTE: We should never come here because rt2x00lib is
 473                  * supposed to catch this and send us the correct antenna
 474                  * explicitely. However we are nog going to bug about this.
 475                  * Instead, just default to antenna B.
 476                  */
 477         case ANTENNA_B:
 478                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 2);
 479                 break;
 480         }
 481
 482         /*
 483          * RT2525E and RT5222 need to flip TX I/Q
 484          */
 485         if (rt2x00_rf(&rt2x00dev->chip, RF2525E) ||
 486             rt2x00_rf(&rt2x00dev->chip, RF5222)) {
 487                 rt2x00_set_field8(&r2, BBP_R2_TX_IQ_FLIP, 1);
 488                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 1);
 489                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 1);
 490
 491                 /*
 492                  * RT2525E does not need RX I/Q Flip.
 493                  */
 494                 if (rt2x00_rf(&rt2x00dev->chip, RF2525E))
 495                         rt2x00_set_field8(&r14, BBP_R14_RX_IQ_FLIP, 0);
 496         } else {
 497                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 0);
 498                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 0);
 499         }
 500
 501         rt2500usb_bbp_write(rt2x00dev, 2, r2);
 502         rt2500usb_bbp_write(rt2x00dev, 14, r14);
 503         rt2500usb_register_write(rt2x00dev, PHY_CSR5, csr5);
 504         rt2500usb_register_write(rt2x00dev, PHY_CSR6, csr6);
 505 }
 506
 507 static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
 508                                       struct rt2x00lib_conf *libconf)
 509 {
 510         u16 reg;
 511
 512         rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
 513
 514         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
 515         rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
 516                            libconf->conf->beacon_int * 4);
 517         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
 518 }
 519
 520 static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
 521                              const unsigned int flags,
 522                              struct rt2x00lib_conf *libconf)
 523 {
 524         if (flags & CONFIG_UPDATE_PHYMODE)
 525                 rt2500usb_config_phymode(rt2x00dev, libconf->phymode,
 526                                          libconf->basic_rates);
 527         if (flags & CONFIG_UPDATE_CHANNEL)
 528                 rt2500usb_config_channel(rt2x00dev, &libconf->rf,
 529                                          libconf->conf->power_level);
 530         if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
 531                 rt2500usb_config_txpower(rt2x00dev,
 532                                          libconf->conf->power_level);
 533         if (flags & CONFIG_UPDATE_ANTENNA)
 534                 rt2500usb_config_antenna(rt2x00dev, &libconf->ant);
 535         if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
 536                 rt2500usb_config_duration(rt2x00dev, libconf);
 537 }
 538
 539 /*
 540  * LED functions.
 541  */
 542 static void rt2500usb_enable_led(struct rt2x00_dev *rt2x00dev)
 543 {
 544         u16 reg;
 545
 546         rt2500usb_register_read(rt2x00dev, MAC_CSR21, &reg);
 547         rt2x00_set_field16(&reg, MAC_CSR21_ON_PERIOD, 70);
 548         rt2x00_set_field16(&reg, MAC_CSR21_OFF_PERIOD, 30);
 549         rt2500usb_register_write(rt2x00dev, MAC_CSR21, reg);
 550
 551         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
 552         rt2x00_set_field16(&reg, MAC_CSR20_LINK,
 553                            (rt2x00dev->led_mode != LED_MODE_ASUS));
 554         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY,
 555                            (rt2x00dev->led_mode != LED_MODE_TXRX_ACTIVITY));
 556         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
 557 }
 558
 559 static void rt2500usb_disable_led(struct rt2x00_dev *rt2x00dev)
 560 {
 561         u16 reg;
 562
 563         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
 564         rt2x00_set_field16(&reg, MAC_CSR20_LINK, 0);
 565         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY, 0);
 566         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
 567 }
 568
 569 /*
 570  * Link tuning
 571  */
 572 static void rt2500usb_link_stats(struct rt2x00_dev *rt2x00dev,
 573                                  struct link_qual *qual)
 574 {
 575         u16 reg;
 576
 577         /*
 578          * Update FCS error count from register.
 579          */
 580         rt2500usb_register_read(rt2x00dev, STA_CSR0, &reg);
 581         qual->rx_failed = rt2x00_get_field16(reg, STA_CSR0_FCS_ERROR);
 582
 583         /*
 584          * Update False CCA count from register.
 585          */
 586         rt2500usb_register_read(rt2x00dev, STA_CSR3, &reg);
 587         qual->false_cca = rt2x00_get_field16(reg, STA_CSR3_FALSE_CCA_ERROR);
 588 }
 589
 590 static void rt2500usb_reset_tuner(struct rt2x00_dev *rt2x00dev)
 591 {
 592         u16 eeprom;
 593         u16 value;
 594
 595         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &eeprom);
 596         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R24_LOW);
 597         rt2500usb_bbp_write(rt2x00dev, 24, value);
 598
 599         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &eeprom);
 600         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R25_LOW);
 601         rt2500usb_bbp_write(rt2x00dev, 25, value);
 602
 603         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &eeprom);
 604         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R61_LOW);
 605         rt2500usb_bbp_write(rt2x00dev, 61, value);
 606
 607         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &eeprom);
 608         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_VGCUPPER);
 609         rt2500usb_bbp_write(rt2x00dev, 17, value);
 610
 611         rt2x00dev->link.vgc_level = value;
 612 }
 613
 614 static void rt2500usb_link_tuner(struct rt2x00_dev *rt2x00dev)
 615 {
 616         int rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
 617         u16 bbp_thresh;
 618         u16 vgc_bound;
 619         u16 sens;
 620         u16 r24;
 621         u16 r25;
 622         u16 r61;
 623         u16 r17_sens;
 624         u8 r17;
 625         u8 up_bound;
 626         u8 low_bound;
 627
 628         /*
 629          * Determine the BBP tuning threshold and correctly
 630          * set BBP 24, 25 and 61.
 631          */
 632         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &bbp_thresh);
 633         bbp_thresh = rt2x00_get_field16(bbp_thresh, EEPROM_BBPTUNE_THRESHOLD);
 634
 635         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &r24);
 636         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &r25);
 637         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &r61);
 638
 639         if ((rssi + bbp_thresh) > 0) {
 640                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_HIGH);
 641                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_HIGH);
 642                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_HIGH);
 643         } else {
 644                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_LOW);
 645                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_LOW);
 646                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_LOW);
 647         }
 648
 649         rt2500usb_bbp_write(rt2x00dev, 24, r24);
 650         rt2500usb_bbp_write(rt2x00dev, 25, r25);
 651         rt2500usb_bbp_write(rt2x00dev, 61, r61);
 652
 653         /*
 654          * Read current r17 value, as well as the sensitivity values
 655          * for the r17 register.
 656          */
 657         rt2500usb_bbp_read(rt2x00dev, 17, &r17);
 658         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &r17_sens);
 659
 660         /*
 661          * A too low RSSI will cause too much false CCA which will
 662          * then corrupt the R17 tuning. To remidy this the tuning should
 663          * be stopped (While making sure the R17 value will not exceed limits)
 664          */
 665         if (rssi >= -40) {
 666                 if (r17 != 0x60)
 667                         rt2500usb_bbp_write(rt2x00dev, 17, 0x60);
 668                 return;
 669         }
 670
 671         /*
 672          * Special big-R17 for short distance
 673          */
 674         if (rssi >= -58) {
 675                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_LOW);
 676                 if (r17 != sens)
 677                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
 678                 return;
 679         }
 680
 681         /*
 682          * Special mid-R17 for middle distance
 683          */
 684         if (rssi >= -74) {
 685                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_HIGH);
 686                 if (r17 != sens)
 687                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
 688                 return;
 689         }
 690
 691         /*
 692          * Leave short or middle distance condition, restore r17
 693          * to the dynamic tuning range.
 694          */
 695         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &vgc_bound);
 696         vgc_bound = rt2x00_get_field16(vgc_bound, EEPROM_BBPTUNE_VGCUPPER);
 697
 698         low_bound = 0x32;
 699         if (rssi >= -77)
 700                 up_bound = vgc_bound;
 701         else
 702                 up_bound = vgc_bound - (-77 - rssi);
 703
 704         if (up_bound < low_bound)
 705                 up_bound = low_bound;
 706
 707         if (r17 > up_bound) {
 708                 rt2500usb_bbp_write(rt2x00dev, 17, up_bound);
 709                 rt2x00dev->link.vgc_level = up_bound;
 710         } else if (rt2x00dev->link.qual.false_cca > 512 && r17 < up_bound) {
 711                 rt2500usb_bbp_write(rt2x00dev, 17, ++r17);
 712                 rt2x00dev->link.vgc_level = r17;
 713         } else if (rt2x00dev->link.qual.false_cca < 100 && r17 > low_bound) {
 714                 rt2500usb_bbp_write(rt2x00dev, 17, --r17);
 715                 rt2x00dev->link.vgc_level = r17;
 716         }
 717 }
 718
 719 /*
 720  * Initialization functions.
 721  */
 722 static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
 723 {
 724         u16 reg;
 725
 726         rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE, 0x0001,
 727                                     USB_MODE_TEST, REGISTER_TIMEOUT);
 728         rt2x00usb_vendor_request_sw(rt2x00dev, USB_SINGLE_WRITE, 0x0308,
 729                                     0x00f0, REGISTER_TIMEOUT);
 730
 731         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
 732         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX, 1);
 733         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
 734
 735         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x1111);
 736         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x1e11);
 737
 738         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 739         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 1);
 740         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 1);
 741         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
 742         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 743
 744         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 745         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
 746         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
 747         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
 748         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 749
 750         rt2500usb_register_read(rt2x00dev, TXRX_CSR5, &reg);
 751         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0, 13);
 752         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0_VALID, 1);
 753         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1, 12);
 754         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1_VALID, 1);
 755         rt2500usb_register_write(rt2x00dev, TXRX_CSR5, reg);
 756
 757         rt2500usb_register_read(rt2x00dev, TXRX_CSR6, &reg);
 758         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0, 10);
 759         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0_VALID, 1);
 760         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1, 11);
 761         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1_VALID, 1);
 762         rt2500usb_register_write(rt2x00dev, TXRX_CSR6, reg);
 763
 764         rt2500usb_register_read(rt2x00dev, TXRX_CSR7, &reg);
 765         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0, 7);
 766         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0_VALID, 1);
 767         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1, 6);
 768         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1_VALID, 1);
 769         rt2500usb_register_write(rt2x00dev, TXRX_CSR7, reg);
 770
 771         rt2500usb_register_read(rt2x00dev, TXRX_CSR8, &reg);
 772         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0, 5);
 773         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0_VALID, 1);
 774         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1, 0);
 775         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1_VALID, 0);
 776         rt2500usb_register_write(rt2x00dev, TXRX_CSR8, reg);
 777
 778         rt2500usb_register_write(rt2x00dev, TXRX_CSR21, 0xe78f);
 779         rt2500usb_register_write(rt2x00dev, MAC_CSR9, 0xff1d);
 780
 781         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
 782                 return -EBUSY;
 783
 784         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
 785         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
 786         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
 787         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 1);
 788         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
 789
 790         if (rt2x00_rev(&rt2x00dev->chip) >= RT2570_VERSION_C) {
 791                 rt2500usb_register_read(rt2x00dev, PHY_CSR2, &reg);
 792                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 0);
 793         } else {
 794                 reg = 0;
 795                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 1);
 796                 rt2x00_set_field16(&reg, PHY_CSR2_LNA_MODE, 3);
 797         }
 798         rt2500usb_register_write(rt2x00dev, PHY_CSR2, reg);
 799
 800         rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0002);
 801         rt2500usb_register_write(rt2x00dev, MAC_CSR22, 0x0053);
 802         rt2500usb_register_write(rt2x00dev, MAC_CSR15, 0x01ee);
 803         rt2500usb_register_write(rt2x00dev, MAC_CSR16, 0x0000);
 804
 805         rt2500usb_register_read(rt2x00dev, MAC_CSR8, &reg);
 806         rt2x00_set_field16(&reg, MAC_CSR8_MAX_FRAME_UNIT,
 807                            rt2x00dev->rx->data_size);
 808         rt2500usb_register_write(rt2x00dev, MAC_CSR8, reg);
 809
 810         rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
 811         rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
 812         rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0xff);
 813         rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);
 814
 815         rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
 816         rt2x00_set_field16(&reg, MAC_CSR18_DELAY_AFTER_BEACON, 90);
 817         rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);
 818
 819         rt2500usb_register_read(rt2x00dev, PHY_CSR4, &reg);
 820         rt2x00_set_field16(&reg, PHY_CSR4_LOW_RF_LE, 1);
 821         rt2500usb_register_write(rt2x00dev, PHY_CSR4, reg);
 822
 823         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
 824         rt2x00_set_field16(&reg, TXRX_CSR1_AUTO_SEQUENCE, 1);
 825         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
 826
 827         return 0;
 828 }
 829
 830 static int rt2500usb_init_bbp(struct rt2x00_dev *rt2x00dev)
 831 {
 832         unsigned int i;
 833         u16 eeprom;
 834         u8 value;
 835         u8 reg_id;
 836
 837         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 838                 rt2500usb_bbp_read(rt2x00dev, 0, &value);
 839                 if ((value != 0xff) && (value != 0x00))
 840                         goto continue_csr_init;
 841                 NOTICE(rt2x00dev, "Waiting for BBP register.\n");
 842                 udelay(REGISTER_BUSY_DELAY);
 843         }
 844
 845         ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
 846         return -EACCES;
 847
 848 continue_csr_init:
 849         rt2500usb_bbp_write(rt2x00dev, 3, 0x02);
 850         rt2500usb_bbp_write(rt2x00dev, 4, 0x19);
 851         rt2500usb_bbp_write(rt2x00dev, 14, 0x1c);
 852         rt2500usb_bbp_write(rt2x00dev, 15, 0x30);
 853         rt2500usb_bbp_write(rt2x00dev, 16, 0xac);
 854         rt2500usb_bbp_write(rt2x00dev, 18, 0x18);
 855         rt2500usb_bbp_write(rt2x00dev, 19, 0xff);
 856         rt2500usb_bbp_write(rt2x00dev, 20, 0x1e);
 857         rt2500usb_bbp_write(rt2x00dev, 21, 0x08);
 858         rt2500usb_bbp_write(rt2x00dev, 22, 0x08);
 859         rt2500usb_bbp_write(rt2x00dev, 23, 0x08);
 860         rt2500usb_bbp_write(rt2x00dev, 24, 0x80);
 861         rt2500usb_bbp_write(rt2x00dev, 25, 0x50);
 862         rt2500usb_bbp_write(rt2x00dev, 26, 0x08);
 863         rt2500usb_bbp_write(rt2x00dev, 27, 0x23);
 864         rt2500usb_bbp_write(rt2x00dev, 30, 0x10);
 865         rt2500usb_bbp_write(rt2x00dev, 31, 0x2b);
 866         rt2500usb_bbp_write(rt2x00dev, 32, 0xb9);
 867         rt2500usb_bbp_write(rt2x00dev, 34, 0x12);
 868         rt2500usb_bbp_write(rt2x00dev, 35, 0x50);
 869         rt2500usb_bbp_write(rt2x00dev, 39, 0xc4);
 870         rt2500usb_bbp_write(rt2x00dev, 40, 0x02);
 871         rt2500usb_bbp_write(rt2x00dev, 41, 0x60);
 872         rt2500usb_bbp_write(rt2x00dev, 53, 0x10);
 873         rt2500usb_bbp_write(rt2x00dev, 54, 0x18);
 874         rt2500usb_bbp_write(rt2x00dev, 56, 0x08);
 875         rt2500usb_bbp_write(rt2x00dev, 57, 0x10);
 876         rt2500usb_bbp_write(rt2x00dev, 58, 0x08);
 877         rt2500usb_bbp_write(rt2x00dev, 61, 0x60);
 878         rt2500usb_bbp_write(rt2x00dev, 62, 0x10);
 879         rt2500usb_bbp_write(rt2x00dev, 75, 0xff);
 880
 881         DEBUG(rt2x00dev, "Start initialization from EEPROM...\n");
 882         for (i = 0; i < EEPROM_BBP_SIZE; i++) {
 883                 rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);
 884
 885                 if (eeprom != 0xffff && eeprom != 0x0000) {
 886                         reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
 887                         value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
 888                         DEBUG(rt2x00dev, "BBP: 0x%02x, value: 0x%02x.\n",
 889                               reg_id, value);
 890                         rt2500usb_bbp_write(rt2x00dev, reg_id, value);
 891                 }
 892         }
 893         DEBUG(rt2x00dev, "...End initialization from EEPROM.\n");
 894
 895         return 0;
 896 }
 897
 898 /*
 899  * Device state switch handlers.
 900  */
 901 static void rt2500usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
 902                                 enum dev_state state)
 903 {
 904         u16 reg;
 905
 906         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
 907         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX,
 908                            state == STATE_RADIO_RX_OFF);
 909         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
 910 }
 911
 912 static int rt2500usb_enable_radio(struct rt2x00_dev *rt2x00dev)
 913 {
 914         /*
 915          * Initialize all registers.
 916          */
 917         if (rt2500usb_init_registers(rt2x00dev) ||
 918             rt2500usb_init_bbp(rt2x00dev)) {
 919                 ERROR(rt2x00dev, "Register initialization failed.\n");
 920                 return -EIO;
 921         }
 922
 923         /*
 924          * Enable LED
 925          */
 926         rt2500usb_enable_led(rt2x00dev);
 927
 928         return 0;
 929 }
 930
 931 static void rt2500usb_disable_radio(struct rt2x00_dev *rt2x00dev)
 932 {
 933         /*
 934          * Disable LED
 935          */
 936         rt2500usb_disable_led(rt2x00dev);
 937
 938         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x2121);
 939         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x2121);
 940
 941         /*
 942          * Disable synchronisation.
 943          */
 944         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
 945
 946         rt2x00usb_disable_radio(rt2x00dev);
 947 }
 948
 949 static int rt2500usb_set_state(struct rt2x00_dev *rt2x00dev,
 950                                enum dev_state state)
 951 {
 952         u16 reg;
 953         u16 reg2;
 954         unsigned int i;
 955         char put_to_sleep;
 956         char bbp_state;
 957         char rf_state;
 958
 959         put_to_sleep = (state != STATE_AWAKE);
 960
 961         reg = 0;
 962         rt2x00_set_field16(&reg, MAC_CSR17_BBP_DESIRE_STATE, state);
 963         rt2x00_set_field16(&reg, MAC_CSR17_RF_DESIRE_STATE, state);
 964         rt2x00_set_field16(&reg, MAC_CSR17_PUT_TO_SLEEP, put_to_sleep);
 965         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 966         rt2x00_set_field16(&reg, MAC_CSR17_SET_STATE, 1);
 967         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 968
 969         /*
 970          * Device is not guaranteed to be in the requested state yet.
 971          * We must wait until the register indicates that the
 972          * device has entered the correct state.
 973          */
 974         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
 975                 rt2500usb_register_read(rt2x00dev, MAC_CSR17, &reg2);
 976                 bbp_state = rt2x00_get_field16(reg2, MAC_CSR17_BBP_CURR_STATE);
 977                 rf_state = rt2x00_get_field16(reg2, MAC_CSR17_RF_CURR_STATE);
 978                 if (bbp_state == state && rf_state == state)
 979                         return 0;
 980                 rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
 981                 msleep(30);
 982         }
 983
 984         NOTICE(rt2x00dev, "Device failed to enter state %d, "
 985                "current device state: bbp %d and rf %d.\n",
 986                state, bbp_state, rf_state);
 987
 988         return -EBUSY;
 989 }
 990
 991 static int rt2500usb_set_device_state(struct rt2x00_dev *rt2x00dev,
 992                                       enum dev_state state)
 993 {
 994         int retval = 0;
 995
 996         switch (state) {
 997         case STATE_RADIO_ON:
 998                 retval = rt2500usb_enable_radio(rt2x00dev);
 999                 break;
1000         case STATE_RADIO_OFF:
1001                 rt2500usb_disable_radio(rt2x00dev);
1002                 break;
1003         case STATE_RADIO_RX_ON:
1004         case STATE_RADIO_RX_ON_LINK:
1005                 rt2500usb_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
1006                 break;
1007         case STATE_RADIO_RX_OFF:
1008         case STATE_RADIO_RX_OFF_LINK:
1009                 rt2500usb_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
1010                 break;
1011         case STATE_DEEP_SLEEP:
1012         case STATE_SLEEP:
1013         case STATE_STANDBY:
1014         case STATE_AWAKE:
1015                 retval = rt2500usb_set_state(rt2x00dev, state);
1016                 break;
1017         default:
1018                 retval = -ENOTSUPP;
1019                 break;
1020         }
1021
1022         return retval;
1023 }
1024
1025 /*
1026  * TX descriptor initialization
1027  */
1028 static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
1029                                     struct sk_buff *skb,
1030                                     struct txdata_entry_desc *desc,
1031                                     struct ieee80211_tx_control *control)
1032 {
1033         struct skb_desc *skbdesc = get_skb_desc(skb);
1034         __le32 *txd = skbdesc->desc;
1035         u32 word;
1036
1037         /*
1038          * Start writing the descriptor words.
1039          */
1040         rt2x00_desc_read(txd, 1, &word);
1041         rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
1042         rt2x00_set_field32(&word, TXD_W1_AIFS, desc->aifs);
1043         rt2x00_set_field32(&word, TXD_W1_CWMIN, desc->cw_min);
1044         rt2x00_set_field32(&word, TXD_W1_CWMAX, desc->cw_max);
1045         rt2x00_desc_write(txd, 1, word);
1046
1047         rt2x00_desc_read(txd, 2, &word);
1048         rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, desc->signal);
1049         rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, desc->service);
1050         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, desc->length_low);
1051         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, desc->length_high);
1052         rt2x00_desc_write(txd, 2, word);
1053
1054         rt2x00_desc_read(txd, 0, &word);
1055         rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, control->retry_limit);
1056         rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
1057                            test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
1058         rt2x00_set_field32(&word, TXD_W0_ACK,
1059                            test_bit(ENTRY_TXD_ACK, &desc->flags));
1060         rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
1061                            test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
1062         rt2x00_set_field32(&word, TXD_W0_OFDM,
1063                            test_bit(ENTRY_TXD_OFDM_RATE, &desc->flags));
1064         rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
1065                            !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));
1066         rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);
1067         rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, skbdesc->data_len);
1068         rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
1069         rt2x00_desc_write(txd, 0, word);
1070 }
1071
1072 static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
1073                                      struct sk_buff *skb)
1074 {
1075         int length;
1076
1077         /*
1078          * The length _must_ be a multiple of 2,
1079          * but it must _not_ be a multiple of the USB packet size.
1080          */
1081         length = roundup(skb->len, 2);
1082         length += (2 * !(length % rt2x00dev->usb_maxpacket));
1083
1084         return length;
1085 }
1086
1087 /*
1088  * TX data initialization
1089  */
1090 static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
1091                                     unsigned int queue)
1092 {
1093         u16 reg;
1094
1095         if (queue != IEEE80211_TX_QUEUE_BEACON)
1096                 return;
1097
1098         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
1099         if (!rt2x00_get_field16(reg, TXRX_CSR19_BEACON_GEN)) {
1100                 rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 1);
1101                 /*
1102                  * Beacon generation will fail initially.
1103                  * To prevent this we need to register the TXRX_CSR19
1104                  * register several times.
1105                  */
1106                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1107                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
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         }
1112 }
1113
1114 /*
1115  * RX control handlers
1116  */
1117 static void rt2500usb_fill_rxdone(struct data_entry *entry,
1118                                   struct rxdata_entry_desc *desc)
1119 {
1120         struct skb_desc *skbdesc = get_skb_desc(entry->skb);
1121         struct urb *urb = entry->priv;
1122         __le32 *rxd = (__le32 *)(entry->skb->data +
1123                                  (urb->actual_length - entry->ring->desc_size));
1124         u32 word0;
1125         u32 word1;
1126
1127         rt2x00_desc_read(rxd, 0, &word0);
1128         rt2x00_desc_read(rxd, 1, &word1);
1129
1130         desc->flags = 0;
1131         if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
1132                 desc->flags |= RX_FLAG_FAILED_FCS_CRC;
1133         if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
1134                 desc->flags |= RX_FLAG_FAILED_PLCP_CRC;
1135
1136         /*
1137          * Obtain the status about this packet.
1138          */
1139         desc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
1140         desc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -
1141             entry->ring->rt2x00dev->rssi_offset;
1142         desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
1143         desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
1144         desc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
1145
1146         /*
1147          * Set descriptor and data pointer.
1148          */
1149         skbdesc->desc = entry->skb->data + desc->size;
1150         skbdesc->desc_len = entry->ring->desc_size;
1151         skbdesc->data = entry->skb->data;
1152         skbdesc->data_len = desc->size;
1153 }
1154
1155 /*
1156  * Interrupt functions.
1157  */
1158 static void rt2500usb_beacondone(struct urb *urb)
1159 {
1160         struct data_entry *entry = (struct data_entry *)urb->context;
1161         struct data_ring *ring = entry->ring;
1162
1163         if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))
1164                 return;
1165
1166         /*
1167          * Check if this was the guardian beacon,
1168          * if that was the case we need to send the real beacon now.
1169          * Otherwise we should free the sk_buffer, the device
1170          * should be doing the rest of the work now.
1171          */
1172         if (ring->index == 1) {
1173                 rt2x00_ring_index_done_inc(ring);
1174                 entry = rt2x00_get_data_entry(ring);
1175                 usb_submit_urb(entry->priv, GFP_ATOMIC);
1176                 rt2x00_ring_index_inc(ring);
1177         } else if (ring->index_done == 1) {
1178                 entry = rt2x00_get_data_entry_done(ring);
1179                 if (entry->skb) {
1180                         dev_kfree_skb(entry->skb);
1181                         entry->skb = NULL;
1182                 }
1183                 rt2x00_ring_index_done_inc(ring);
1184         }
1185 }
1186
1187 /*
1188  * Device probe functions.
1189  */
1190 static int rt2500usb_validate_eeprom(struct rt2x00_dev *rt2x00dev)
1191 {
1192         u16 word;
1193         u8 *mac;
1194
1195         rt2x00usb_eeprom_read(rt2x00dev, rt2x00dev->eeprom, EEPROM_SIZE);
1196
1197         /*
1198          * Start validation of the data that has been read.
1199          */
1200         mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
1201         if (!is_valid_ether_addr(mac)) {
1202                 DECLARE_MAC_BUF(macbuf);
1203
1204                 random_ether_addr(mac);
1205                 EEPROM(rt2x00dev, "MAC: %s\n", print_mac(macbuf, mac));
1206         }
1207
1208         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
1209         if (word == 0xffff) {
1210                 rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
1211                 rt2x00_set_field16(&word, EEPROM_ANTENNA_TX_DEFAULT,
1212                                    ANTENNA_SW_DIVERSITY);
1213                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RX_DEFAULT,
1214                                    ANTENNA_SW_DIVERSITY);
1215                 rt2x00_set_field16(&word, EEPROM_ANTENNA_LED_MODE,
1216                                    LED_MODE_DEFAULT);
1217                 rt2x00_set_field16(&word, EEPROM_ANTENNA_DYN_TXAGC, 0);
1218                 rt2x00_set_field16(&word, EEPROM_ANTENNA_HARDWARE_RADIO, 0);
1219                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF2522);
1220                 rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
1221                 EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
1222         }
1223
1224         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
1225         if (word == 0xffff) {
1226                 rt2x00_set_field16(&word, EEPROM_NIC_CARDBUS_ACCEL, 0);
1227                 rt2x00_set_field16(&word, EEPROM_NIC_DYN_BBP_TUNE, 0);
1228                 rt2x00_set_field16(&word, EEPROM_NIC_CCK_TX_POWER, 0);
1229                 rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
1230                 EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
1231         }
1232
1233         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &word);
1234         if (word == 0xffff) {
1235                 rt2x00_set_field16(&word, EEPROM_CALIBRATE_OFFSET_RSSI,
1236                                    DEFAULT_RSSI_OFFSET);
1237                 rt2x00_eeprom_write(rt2x00dev, EEPROM_CALIBRATE_OFFSET, word);
1238                 EEPROM(rt2x00dev, "Calibrate offset: 0x%04x\n", word);
1239         }
1240
1241         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &word);
1242         if (word == 0xffff) {
1243                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_THRESHOLD, 45);
1244                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE, word);
1245                 EEPROM(rt2x00dev, "BBPtune: 0x%04x\n", word);
1246         }
1247
1248         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &word);
1249         if (word == 0xffff) {
1250                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCUPPER, 0x40);
1251                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_VGC, word);
1252                 EEPROM(rt2x00dev, "BBPtune vgc: 0x%04x\n", word);
1253         }
1254
1255         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &word);
1256         if (word == 0xffff) {
1257                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_LOW, 0x48);
1258                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_HIGH, 0x41);
1259                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R17, word);
1260                 EEPROM(rt2x00dev, "BBPtune r17: 0x%04x\n", word);
1261         }
1262
1263         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &word);
1264         if (word == 0xffff) {
1265                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_LOW, 0x40);
1266                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_HIGH, 0x80);
1267                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R24, word);
1268                 EEPROM(rt2x00dev, "BBPtune r24: 0x%04x\n", word);
1269         }
1270
1271         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &word);
1272         if (word == 0xffff) {
1273                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_LOW, 0x40);
1274                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_HIGH, 0x50);
1275                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R25, word);
1276                 EEPROM(rt2x00dev, "BBPtune r25: 0x%04x\n", word);
1277         }
1278
1279         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &word);
1280         if (word == 0xffff) {
1281                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_LOW, 0x60);
1282                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_HIGH, 0x6d);
1283                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R61, word);
1284                 EEPROM(rt2x00dev, "BBPtune r61: 0x%04x\n", word);
1285         }
1286
1287         return 0;
1288 }
1289
1290 static int rt2500usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
1291 {
1292         u16 reg;
1293         u16 value;
1294         u16 eeprom;
1295
1296         /*
1297          * Read EEPROM word for configuration.
1298          */
1299         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
1300
1301         /*
1302          * Identify RF chipset.
1303          */
1304         value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
1305         rt2500usb_register_read(rt2x00dev, MAC_CSR0, &reg);
1306         rt2x00_set_chip(rt2x00dev, RT2570, value, reg);
1307
1308         if (!rt2x00_check_rev(&rt2x00dev->chip, 0)) {
1309                 ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
1310                 return -ENODEV;
1311         }
1312
1313         if (!rt2x00_rf(&rt2x00dev->chip, RF2522) &&
1314             !rt2x00_rf(&rt2x00dev->chip, RF2523) &&
1315             !rt2x00_rf(&rt2x00dev->chip, RF2524) &&
1316             !rt2x00_rf(&rt2x00dev->chip, RF2525) &&
1317             !rt2x00_rf(&rt2x00dev->chip, RF2525E) &&
1318             !rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1319                 ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
1320                 return -ENODEV;
1321         }
1322
1323         /*
1324          * Identify default antenna configuration.
1325          */
1326         rt2x00dev->default_ant.tx =
1327             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TX_DEFAULT);
1328         rt2x00dev->default_ant.rx =
1329             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_DEFAULT);
1330
1331         /*
1332          * When the eeprom indicates SW_DIVERSITY use HW_DIVERSITY instead.
1333          * I am not 100% sure about this, but the legacy drivers do not
1334          * indicate antenna swapping in software is required when
1335          * diversity is enabled.
1336          */
1337         if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
1338                 rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY;
1339         if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
1340                 rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY;
1341
1342         /*
1343          * Store led mode, for correct led behaviour.
1344          */
1345         rt2x00dev->led_mode =
1346             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_LED_MODE);
1347
1348         /*
1349          * Check if the BBP tuning should be disabled.
1350          */
1351         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
1352         if (rt2x00_get_field16(eeprom, EEPROM_NIC_DYN_BBP_TUNE))
1353                 __set_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags);
1354
1355         /*
1356          * Read the RSSI <-> dBm offset information.
1357          */
1358         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &eeprom);
1359         rt2x00dev->rssi_offset =
1360             rt2x00_get_field16(eeprom, EEPROM_CALIBRATE_OFFSET_RSSI);
1361
1362         return 0;
1363 }
1364
1365 /*
1366  * RF value list for RF2522
1367  * Supports: 2.4 GHz
1368  */
1369 static const struct rf_channel rf_vals_bg_2522[] = {
1370         { 1,  0x00002050, 0x000c1fda, 0x00000101, 0 },
1371         { 2,  0x00002050, 0x000c1fee, 0x00000101, 0 },
1372         { 3,  0x00002050, 0x000c2002, 0x00000101, 0 },
1373         { 4,  0x00002050, 0x000c2016, 0x00000101, 0 },
1374         { 5,  0x00002050, 0x000c202a, 0x00000101, 0 },
1375         { 6,  0x00002050, 0x000c203e, 0x00000101, 0 },
1376         { 7,  0x00002050, 0x000c2052, 0x00000101, 0 },
1377         { 8,  0x00002050, 0x000c2066, 0x00000101, 0 },
1378         { 9,  0x00002050, 0x000c207a, 0x00000101, 0 },
1379         { 10, 0x00002050, 0x000c208e, 0x00000101, 0 },
1380         { 11, 0x00002050, 0x000c20a2, 0x00000101, 0 },
1381         { 12, 0x00002050, 0x000c20b6, 0x00000101, 0 },
1382         { 13, 0x00002050, 0x000c20ca, 0x00000101, 0 },
1383         { 14, 0x00002050, 0x000c20fa, 0x00000101, 0 },
1384 };
1385
1386 /*
1387  * RF value list for RF2523
1388  * Supports: 2.4 GHz
1389  */
1390 static const struct rf_channel rf_vals_bg_2523[] = {
1391         { 1,  0x00022010, 0x00000c9e, 0x000e0111, 0x00000a1b },
1392         { 2,  0x00022010, 0x00000ca2, 0x000e0111, 0x00000a1b },
1393         { 3,  0x00022010, 0x00000ca6, 0x000e0111, 0x00000a1b },
1394         { 4,  0x00022010, 0x00000caa, 0x000e0111, 0x00000a1b },
1395         { 5,  0x00022010, 0x00000cae, 0x000e0111, 0x00000a1b },
1396         { 6,  0x00022010, 0x00000cb2, 0x000e0111, 0x00000a1b },
1397         { 7,  0x00022010, 0x00000cb6, 0x000e0111, 0x00000a1b },
1398         { 8,  0x00022010, 0x00000cba, 0x000e0111, 0x00000a1b },
1399         { 9,  0x00022010, 0x00000cbe, 0x000e0111, 0x00000a1b },
1400         { 10, 0x00022010, 0x00000d02, 0x000e0111, 0x00000a1b },
1401         { 11, 0x00022010, 0x00000d06, 0x000e0111, 0x00000a1b },
1402         { 12, 0x00022010, 0x00000d0a, 0x000e0111, 0x00000a1b },
1403         { 13, 0x00022010, 0x00000d0e, 0x000e0111, 0x00000a1b },
1404         { 14, 0x00022010, 0x00000d1a, 0x000e0111, 0x00000a03 },
1405 };
1406
1407 /*
1408  * RF value list for RF2524
1409  * Supports: 2.4 GHz
1410  */
1411 static const struct rf_channel rf_vals_bg_2524[] = {
1412         { 1,  0x00032020, 0x00000c9e, 0x00000101, 0x00000a1b },
1413         { 2,  0x00032020, 0x00000ca2, 0x00000101, 0x00000a1b },
1414         { 3,  0x00032020, 0x00000ca6, 0x00000101, 0x00000a1b },
1415         { 4,  0x00032020, 0x00000caa, 0x00000101, 0x00000a1b },
1416         { 5,  0x00032020, 0x00000cae, 0x00000101, 0x00000a1b },
1417         { 6,  0x00032020, 0x00000cb2, 0x00000101, 0x00000a1b },
1418         { 7,  0x00032020, 0x00000cb6, 0x00000101, 0x00000a1b },
1419         { 8,  0x00032020, 0x00000cba, 0x00000101, 0x00000a1b },
1420         { 9,  0x00032020, 0x00000cbe, 0x00000101, 0x00000a1b },
1421         { 10, 0x00032020, 0x00000d02, 0x00000101, 0x00000a1b },
1422         { 11, 0x00032020, 0x00000d06, 0x00000101, 0x00000a1b },
1423         { 12, 0x00032020, 0x00000d0a, 0x00000101, 0x00000a1b },
1424         { 13, 0x00032020, 0x00000d0e, 0x00000101, 0x00000a1b },
1425         { 14, 0x00032020, 0x00000d1a, 0x00000101, 0x00000a03 },
1426 };
1427
1428 /*
1429  * RF value list for RF2525
1430  * Supports: 2.4 GHz
1431  */
1432 static const struct rf_channel rf_vals_bg_2525[] = {
1433         { 1,  0x00022020, 0x00080c9e, 0x00060111, 0x00000a1b },
1434         { 2,  0x00022020, 0x00080ca2, 0x00060111, 0x00000a1b },
1435         { 3,  0x00022020, 0x00080ca6, 0x00060111, 0x00000a1b },
1436         { 4,  0x00022020, 0x00080caa, 0x00060111, 0x00000a1b },
1437         { 5,  0x00022020, 0x00080cae, 0x00060111, 0x00000a1b },
1438         { 6,  0x00022020, 0x00080cb2, 0x00060111, 0x00000a1b },
1439         { 7,  0x00022020, 0x00080cb6, 0x00060111, 0x00000a1b },
1440         { 8,  0x00022020, 0x00080cba, 0x00060111, 0x00000a1b },
1441         { 9,  0x00022020, 0x00080cbe, 0x00060111, 0x00000a1b },
1442         { 10, 0x00022020, 0x00080d02, 0x00060111, 0x00000a1b },
1443         { 11, 0x00022020, 0x00080d06, 0x00060111, 0x00000a1b },
1444         { 12, 0x00022020, 0x00080d0a, 0x00060111, 0x00000a1b },
1445         { 13, 0x00022020, 0x00080d0e, 0x00060111, 0x00000a1b },
1446         { 14, 0x00022020, 0x00080d1a, 0x00060111, 0x00000a03 },
1447 };
1448
1449 /*
1450  * RF value list for RF2525e
1451  * Supports: 2.4 GHz
1452  */
1453 static const struct rf_channel rf_vals_bg_2525e[] = {
1454         { 1,  0x00022010, 0x0000089a, 0x00060111, 0x00000e1b },
1455         { 2,  0x00022010, 0x0000089e, 0x00060111, 0x00000e07 },
1456         { 3,  0x00022010, 0x0000089e, 0x00060111, 0x00000e1b },
1457         { 4,  0x00022010, 0x000008a2, 0x00060111, 0x00000e07 },
1458         { 5,  0x00022010, 0x000008a2, 0x00060111, 0x00000e1b },
1459         { 6,  0x00022010, 0x000008a6, 0x00060111, 0x00000e07 },
1460         { 7,  0x00022010, 0x000008a6, 0x00060111, 0x00000e1b },
1461         { 8,  0x00022010, 0x000008aa, 0x00060111, 0x00000e07 },
1462         { 9,  0x00022010, 0x000008aa, 0x00060111, 0x00000e1b },
1463         { 10, 0x00022010, 0x000008ae, 0x00060111, 0x00000e07 },
1464         { 11, 0x00022010, 0x000008ae, 0x00060111, 0x00000e1b },
1465         { 12, 0x00022010, 0x000008b2, 0x00060111, 0x00000e07 },
1466         { 13, 0x00022010, 0x000008b2, 0x00060111, 0x00000e1b },
1467         { 14, 0x00022010, 0x000008b6, 0x00060111, 0x00000e23 },
1468 };
1469
1470 /*
1471  * RF value list for RF5222
1472  * Supports: 2.4 GHz & 5.2 GHz
1473  */
1474 static const struct rf_channel rf_vals_5222[] = {
1475         { 1,  0x00022020, 0x00001136, 0x00000101, 0x00000a0b },
1476         { 2,  0x00022020, 0x0000113a, 0x00000101, 0x00000a0b },
1477         { 3,  0x00022020, 0x0000113e, 0x00000101, 0x00000a0b },
1478         { 4,  0x00022020, 0x00001182, 0x00000101, 0x00000a0b },
1479         { 5,  0x00022020, 0x00001186, 0x00000101, 0x00000a0b },
1480         { 6,  0x00022020, 0x0000118a, 0x00000101, 0x00000a0b },
1481         { 7,  0x00022020, 0x0000118e, 0x00000101, 0x00000a0b },
1482         { 8,  0x00022020, 0x00001192, 0x00000101, 0x00000a0b },
1483         { 9,  0x00022020, 0x00001196, 0x00000101, 0x00000a0b },
1484         { 10, 0x00022020, 0x0000119a, 0x00000101, 0x00000a0b },
1485         { 11, 0x00022020, 0x0000119e, 0x00000101, 0x00000a0b },
1486         { 12, 0x00022020, 0x000011a2, 0x00000101, 0x00000a0b },
1487         { 13, 0x00022020, 0x000011a6, 0x00000101, 0x00000a0b },
1488         { 14, 0x00022020, 0x000011ae, 0x00000101, 0x00000a1b },
1489
1490         /* 802.11 UNI / HyperLan 2 */
1491         { 36, 0x00022010, 0x00018896, 0x00000101, 0x00000a1f },
1492         { 40, 0x00022010, 0x0001889a, 0x00000101, 0x00000a1f },
1493         { 44, 0x00022010, 0x0001889e, 0x00000101, 0x00000a1f },
1494         { 48, 0x00022010, 0x000188a2, 0x00000101, 0x00000a1f },
1495         { 52, 0x00022010, 0x000188a6, 0x00000101, 0x00000a1f },
1496         { 66, 0x00022010, 0x000188aa, 0x00000101, 0x00000a1f },
1497         { 60, 0x00022010, 0x000188ae, 0x00000101, 0x00000a1f },
1498         { 64, 0x00022010, 0x000188b2, 0x00000101, 0x00000a1f },
1499
1500         /* 802.11 HyperLan 2 */
1501         { 100, 0x00022010, 0x00008802, 0x00000101, 0x00000a0f },
1502         { 104, 0x00022010, 0x00008806, 0x00000101, 0x00000a0f },
1503         { 108, 0x00022010, 0x0000880a, 0x00000101, 0x00000a0f },
1504         { 112, 0x00022010, 0x0000880e, 0x00000101, 0x00000a0f },
1505         { 116, 0x00022010, 0x00008812, 0x00000101, 0x00000a0f },
1506         { 120, 0x00022010, 0x00008816, 0x00000101, 0x00000a0f },
1507         { 124, 0x00022010, 0x0000881a, 0x00000101, 0x00000a0f },
1508         { 128, 0x00022010, 0x0000881e, 0x00000101, 0x00000a0f },
1509         { 132, 0x00022010, 0x00008822, 0x00000101, 0x00000a0f },
1510         { 136, 0x00022010, 0x00008826, 0x00000101, 0x00000a0f },
1511
1512         /* 802.11 UNII */
1513         { 140, 0x00022010, 0x0000882a, 0x00000101, 0x00000a0f },
1514         { 149, 0x00022020, 0x000090a6, 0x00000101, 0x00000a07 },
1515         { 153, 0x00022020, 0x000090ae, 0x00000101, 0x00000a07 },
1516         { 157, 0x00022020, 0x000090b6, 0x00000101, 0x00000a07 },
1517         { 161, 0x00022020, 0x000090be, 0x00000101, 0x00000a07 },
1518 };
1519
1520 static void rt2500usb_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
1521 {
1522         struct hw_mode_spec *spec = &rt2x00dev->spec;
1523         u8 *txpower;
1524         unsigned int i;
1525
1526         /*
1527          * Initialize all hw fields.
1528          */
1529         rt2x00dev->hw->flags =
1530             IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
1531             IEEE80211_HW_RX_INCLUDES_FCS |
1532             IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
1533         rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE;
1534         rt2x00dev->hw->max_signal = MAX_SIGNAL;
1535         rt2x00dev->hw->max_rssi = MAX_RX_SSI;
1536         rt2x00dev->hw->queues = 2;
1537
1538         SET_IEEE80211_DEV(rt2x00dev->hw, &rt2x00dev_usb(rt2x00dev)->dev);
1539         SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
1540                                 rt2x00_eeprom_addr(rt2x00dev,
1541                                                    EEPROM_MAC_ADDR_0));
1542
1543         /*
1544          * Convert tx_power array in eeprom.
1545          */
1546         txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_START);
1547         for (i = 0; i < 14; i++)
1548                 txpower[i] = TXPOWER_FROM_DEV(txpower[i]);
1549
1550         /*
1551          * Initialize hw_mode information.
1552          */
1553         spec->num_modes = 2;
1554         spec->num_rates = 12;
1555         spec->tx_power_a = NULL;
1556         spec->tx_power_bg = txpower;
1557         spec->tx_power_default = DEFAULT_TXPOWER;
1558
1559         if (rt2x00_rf(&rt2x00dev->chip, RF2522)) {
1560                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2522);
1561                 spec->channels = rf_vals_bg_2522;
1562         } else if (rt2x00_rf(&rt2x00dev->chip, RF2523)) {
1563                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2523);
1564                 spec->channels = rf_vals_bg_2523;
1565         } else if (rt2x00_rf(&rt2x00dev->chip, RF2524)) {
1566                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2524);
1567                 spec->channels = rf_vals_bg_2524;
1568         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525)) {
1569                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525);
1570                 spec->channels = rf_vals_bg_2525;
1571         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
1572                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525e);
1573                 spec->channels = rf_vals_bg_2525e;
1574         } else if (rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1575                 spec->num_channels = ARRAY_SIZE(rf_vals_5222);
1576                 spec->channels = rf_vals_5222;
1577                 spec->num_modes = 3;
1578         }
1579 }
1580
1581 static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
1582 {
1583         int retval;
1584
1585         /*
1586          * Allocate eeprom data.
1587          */
1588         retval = rt2500usb_validate_eeprom(rt2x00dev);
1589         if (retval)
1590                 return retval;
1591
1592         retval = rt2500usb_init_eeprom(rt2x00dev);
1593         if (retval)
1594                 return retval;
1595
1596         /*
1597          * Initialize hw specifications.
1598          */
1599         rt2500usb_probe_hw_mode(rt2x00dev);
1600
1601         /*
1602          * This device requires the beacon ring
1603          */
1604         __set_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
1605
1606         /*
1607          * Set the rssi offset.
1608          */
1609         rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;
1610
1611         return 0;
1612 }
1613
1614 /*
1615  * IEEE80211 stack callback functions.
1616  */
1617 static void rt2500usb_configure_filter(struct ieee80211_hw *hw,
1618                                        unsigned int changed_flags,
1619                                        unsigned int *total_flags,
1620                                        int mc_count,
1621                                        struct dev_addr_list *mc_list)
1622 {
1623         struct rt2x00_dev *rt2x00dev = hw->priv;
1624         u16 reg;
1625
1626         /*
1627          * Mask off any flags we are going to ignore from
1628          * the total_flags field.
1629          */
1630         *total_flags &=
1631             FIF_ALLMULTI |
1632             FIF_FCSFAIL |
1633             FIF_PLCPFAIL |
1634             FIF_CONTROL |
1635             FIF_OTHER_BSS |
1636             FIF_PROMISC_IN_BSS;
1637
1638         /*
1639          * Apply some rules to the filters:
1640          * - Some filters imply different filters to be set.
1641          * - Some things we can't filter out at all.
1642          */
1643         if (mc_count)
1644                 *total_flags |= FIF_ALLMULTI;
1645         if (*total_flags & FIF_OTHER_BSS ||
1646             *total_flags & FIF_PROMISC_IN_BSS)
1647                 *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;
1648
1649         /*
1650          * Check if there is any work left for us.
1651          */
1652         if (rt2x00dev->packet_filter == *total_flags)
1653                 return;
1654         rt2x00dev->packet_filter = *total_flags;
1655
1656         /*
1657          * When in atomic context, reschedule and let rt2x00lib
1658          * call this function again.
1659          */
1660         if (in_atomic()) {
1661                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->filter_work);
1662                 return;
1663         }
1664
1665         /*
1666          * Start configuration steps.
1667          * Note that the version error will always be dropped
1668          * and broadcast frames will always be accepted since
1669          * there is no filter for it at this time.
1670          */
1671         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
1672         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CRC,
1673                            !(*total_flags & FIF_FCSFAIL));
1674         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_PHYSICAL,
1675                            !(*total_flags & FIF_PLCPFAIL));
1676         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CONTROL,
1677                            !(*total_flags & FIF_CONTROL));
1678         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_NOT_TO_ME,
1679                            !(*total_flags & FIF_PROMISC_IN_BSS));
1680         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_TODS,
1681                            !(*total_flags & FIF_PROMISC_IN_BSS));
1682         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_VERSION_ERROR, 1);
1683         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_MULTICAST,
1684                            !(*total_flags & FIF_ALLMULTI));
1685         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_BROADCAST, 0);
1686         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
1687 }
1688
1689 static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
1690                                    struct sk_buff *skb,
1691                                    struct ieee80211_tx_control *control)
1692 {
1693         struct rt2x00_dev *rt2x00dev = hw->priv;
1694         struct usb_device *usb_dev =
1695             interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
1696         struct skb_desc *desc;
1697         struct data_ring *ring;
1698         struct data_entry *beacon;
1699         struct data_entry *guardian;
1700         int pipe = usb_sndbulkpipe(usb_dev, 1);
1701         int length;
1702
1703         /*
1704          * Just in case the ieee80211 doesn't set this,
1705          * but we need this queue set for the descriptor
1706          * initialization.
1707          */
1708         control->queue = IEEE80211_TX_QUEUE_BEACON;
1709         ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
1710
1711         /*
1712          * Obtain 2 entries, one for the guardian byte,
1713          * the second for the actual beacon.
1714          */
1715         guardian = rt2x00_get_data_entry(ring);
1716         rt2x00_ring_index_inc(ring);
1717         beacon = rt2x00_get_data_entry(ring);
1718
1719         /*
1720          * Add the descriptor in front of the skb.
1721          */
1722         skb_push(skb, ring->desc_size);
1723         memset(skb->data, 0, ring->desc_size);
1724
1725         /*
1726          * Fill in skb descriptor
1727          */
1728         desc = get_skb_desc(skb);
1729         desc->desc_len = ring->desc_size;
1730         desc->data_len = skb->len - ring->desc_size;
1731         desc->desc = skb->data;
1732         desc->data = skb->data + ring->desc_size;
1733         desc->ring = ring;
1734         desc->entry = beacon;
1735
1736         rt2x00lib_write_tx_desc(rt2x00dev, skb, control);
1737
1738         /*
1739          * USB devices cannot blindly pass the skb->len as the
1740          * length of the data to usb_fill_bulk_urb. Pass the skb
1741          * to the driver to determine what the length should be.
1742          */
1743         length = rt2500usb_get_tx_data_len(rt2x00dev, skb);
1744
1745         usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
1746                           skb->data, length, rt2500usb_beacondone, beacon);
1747
1748         /*
1749          * Second we need to create the guardian byte.
1750          * We only need a single byte, so lets recycle
1751          * the 'flags' field we are not using for beacons.
1752          */
1753         guardian->flags = 0;
1754         usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,
1755                           &guardian->flags, 1, rt2500usb_beacondone, guardian);
1756
1757         /*
1758          * Send out the guardian byte.
1759          */
1760         usb_submit_urb(guardian->priv, GFP_ATOMIC);
1761
1762         /*
1763          * Enable beacon generation.
1764          */
1765         rt2500usb_kick_tx_queue(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
1766
1767         return 0;
1768 }
1769
1770 static const struct ieee80211_ops rt2500usb_mac80211_ops = {
1771         .tx                     = rt2x00mac_tx,
1772         .start                  = rt2x00mac_start,
1773         .stop                   = rt2x00mac_stop,
1774         .add_interface          = rt2x00mac_add_interface,
1775         .remove_interface       = rt2x00mac_remove_interface,
1776         .config                 = rt2x00mac_config,
1777         .config_interface       = rt2x00mac_config_interface,
1778         .configure_filter       = rt2500usb_configure_filter,
1779         .get_stats              = rt2x00mac_get_stats,
1780         .bss_info_changed       = rt2x00mac_bss_info_changed,
1781         .conf_tx                = rt2x00mac_conf_tx,
1782         .get_tx_stats           = rt2x00mac_get_tx_stats,
1783         .beacon_update          = rt2500usb_beacon_update,
1784 };
1785
1786 static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
1787         .probe_hw               = rt2500usb_probe_hw,
1788         .initialize             = rt2x00usb_initialize,
1789         .uninitialize           = rt2x00usb_uninitialize,
1790         .init_rxentry           = rt2x00usb_init_rxentry,
1791         .init_txentry           = rt2x00usb_init_txentry,
1792         .set_device_state       = rt2500usb_set_device_state,
1793         .link_stats             = rt2500usb_link_stats,
1794         .reset_tuner            = rt2500usb_reset_tuner,
1795         .link_tuner             = rt2500usb_link_tuner,
1796         .write_tx_desc          = rt2500usb_write_tx_desc,
1797         .write_tx_data          = rt2x00usb_write_tx_data,
1798         .get_tx_data_len        = rt2500usb_get_tx_data_len,
1799         .kick_tx_queue          = rt2500usb_kick_tx_queue,
1800         .fill_rxdone            = rt2500usb_fill_rxdone,
1801         .config_mac_addr        = rt2500usb_config_mac_addr,
1802         .config_bssid           = rt2500usb_config_bssid,
1803         .config_type            = rt2500usb_config_type,
1804         .config_preamble        = rt2500usb_config_preamble,
1805         .config                 = rt2500usb_config,
1806 };
1807
1808 static const struct rt2x00_ops rt2500usb_ops = {
1809         .name           = KBUILD_MODNAME,
1810         .rxd_size       = RXD_DESC_SIZE,
1811         .txd_size       = TXD_DESC_SIZE,
1812         .eeprom_size    = EEPROM_SIZE,
1813         .rf_size        = RF_SIZE,
1814         .lib            = &rt2500usb_rt2x00_ops,
1815         .hw             = &rt2500usb_mac80211_ops,
1816 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1817         .debugfs        = &rt2500usb_rt2x00debug,
1818 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1819 };
1820
1821 /*
1822  * rt2500usb module information.
1823  */
1824 static struct usb_device_id rt2500usb_device_table[] = {
1825         /* ASUS */
1826         { USB_DEVICE(0x0b05, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1827         { USB_DEVICE(0x0b05, 0x1707), USB_DEVICE_DATA(&rt2500usb_ops) },
1828         /* Belkin */
1829         { USB_DEVICE(0x050d, 0x7050), USB_DEVICE_DATA(&rt2500usb_ops) },
1830         { USB_DEVICE(0x050d, 0x7051), USB_DEVICE_DATA(&rt2500usb_ops) },
1831         { USB_DEVICE(0x050d, 0x705a), USB_DEVICE_DATA(&rt2500usb_ops) },
1832         /* Cisco Systems */
1833         { USB_DEVICE(0x13b1, 0x000d), USB_DEVICE_DATA(&rt2500usb_ops) },
1834         { USB_DEVICE(0x13b1, 0x0011), USB_DEVICE_DATA(&rt2500usb_ops) },
1835         { USB_DEVICE(0x13b1, 0x001a), USB_DEVICE_DATA(&rt2500usb_ops) },
1836         /* Conceptronic */
1837         { USB_DEVICE(0x14b2, 0x3c02), USB_DEVICE_DATA(&rt2500usb_ops) },
1838         /* D-LINK */
1839         { USB_DEVICE(0x2001, 0x3c00), USB_DEVICE_DATA(&rt2500usb_ops) },
1840         /* Gigabyte */
1841         { USB_DEVICE(0x1044, 0x8001), USB_DEVICE_DATA(&rt2500usb_ops) },
1842         { USB_DEVICE(0x1044, 0x8007), USB_DEVICE_DATA(&rt2500usb_ops) },
1843         /* Hercules */
1844         { USB_DEVICE(0x06f8, 0xe000), USB_DEVICE_DATA(&rt2500usb_ops) },
1845         /* Melco */
1846         { USB_DEVICE(0x0411, 0x005e), USB_DEVICE_DATA(&rt2500usb_ops) },
1847         { USB_DEVICE(0x0411, 0x0066), USB_DEVICE_DATA(&rt2500usb_ops) },
1848         { USB_DEVICE(0x0411, 0x0067), USB_DEVICE_DATA(&rt2500usb_ops) },
1849         { USB_DEVICE(0x0411, 0x008b), USB_DEVICE_DATA(&rt2500usb_ops) },
1850         { USB_DEVICE(0x0411, 0x0097), USB_DEVICE_DATA(&rt2500usb_ops) },
1851         /* MSI */
1852         { USB_DEVICE(0x0db0, 0x6861), USB_DEVICE_DATA(&rt2500usb_ops) },
1853         { USB_DEVICE(0x0db0, 0x6865), USB_DEVICE_DATA(&rt2500usb_ops) },
1854         { USB_DEVICE(0x0db0, 0x6869), USB_DEVICE_DATA(&rt2500usb_ops) },
1855         /* Ralink */
1856         { USB_DEVICE(0x148f, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1857         { USB_DEVICE(0x148f, 0x2570), USB_DEVICE_DATA(&rt2500usb_ops) },
1858         { USB_DEVICE(0x148f, 0x2573), USB_DEVICE_DATA(&rt2500usb_ops) },
1859         { USB_DEVICE(0x148f, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1860         /* Siemens */
1861         { USB_DEVICE(0x0681, 0x3c06), USB_DEVICE_DATA(&rt2500usb_ops) },
1862         /* SMC */
1863         { USB_DEVICE(0x0707, 0xee13), USB_DEVICE_DATA(&rt2500usb_ops) },
1864         /* Spairon */
1865         { USB_DEVICE(0x114b, 0x0110), USB_DEVICE_DATA(&rt2500usb_ops) },
1866         /* Trust */
1867         { USB_DEVICE(0x0eb0, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1868         /* Zinwell */
1869         { USB_DEVICE(0x5a57, 0x0260), USB_DEVICE_DATA(&rt2500usb_ops) },
1870         { 0, }
1871 };
1872
1873 MODULE_AUTHOR(DRV_PROJECT);
1874 MODULE_VERSION(DRV_VERSION);
1875 MODULE_DESCRIPTION("Ralink RT2500 USB Wireless LAN driver.");
1876 MODULE_SUPPORTED_DEVICE("Ralink RT2570 USB chipset based cards");
1877 MODULE_DEVICE_TABLE(usb, rt2500usb_device_table);
1878 MODULE_LICENSE("GPL");
1879
1880 static struct usb_driver rt2500usb_driver = {
1881         .name           = KBUILD_MODNAME,
1882         .id_table       = rt2500usb_device_table,
1883         .probe          = rt2x00usb_probe,
1884         .disconnect     = rt2x00usb_disconnect,
1885         .suspend        = rt2x00usb_suspend,
1886         .resume         = rt2x00usb_resume,
1887 };
1888
1889 static int __init rt2500usb_init(void)
1890 {
1891         return usb_register(&rt2500usb_driver);
1892 }
1893
1894 static void __exit rt2500usb_exit(void)
1895 {
1896         usb_deregister(&rt2500usb_driver);
1897 }
1898
1899 module_init(rt2500usb_init);
1900 module_exit(rt2500usb_exit);