drivers/net/wireless/ath/ath9k/pci.c

   1 /*
   2  * Copyright (c) 2008-2011 Atheros Communications Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/nl80211.h>
  20 #include <linux/pci.h>
  21 #include <linux/pci-aspm.h>
  22 #include <linux/ath9k_platform.h>
  23 #include <linux/module.h>
  24 #include "ath9k.h"
  25
  26 static DEFINE_PCI_DEVICE_TABLE(ath_pci_id_table) = {
  27         { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI   */
  28         { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */
  29         { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI   */
  30         { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI   */
  31         { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */
  32
  33         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  34                          0x002A,
  35                          PCI_VENDOR_ID_AZWAVE,
  36                          0x1C71),
  37           .driver_data = ATH9K_PCI_D3_L1_WAR },
  38         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  39                          0x002A,
  40                          PCI_VENDOR_ID_FOXCONN,
  41                          0xE01F),
  42           .driver_data = ATH9K_PCI_D3_L1_WAR },
  43         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  44                          0x002A,
  45                          0x11AD, /* LITEON */
  46                          0x6632),
  47           .driver_data = ATH9K_PCI_D3_L1_WAR },
  48         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  49                          0x002A,
  50                          0x11AD, /* LITEON */
  51                          0x6642),
  52           .driver_data = ATH9K_PCI_D3_L1_WAR },
  53         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  54                          0x002A,
  55                          PCI_VENDOR_ID_QMI,
  56                          0x0306),
  57           .driver_data = ATH9K_PCI_D3_L1_WAR },
  58         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  59                          0x002A,
  60                          0x185F, /* WNC */
  61                          0x309D),
  62           .driver_data = ATH9K_PCI_D3_L1_WAR },
  63         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  64                          0x002A,
  65                          0x10CF, /* Fujitsu */
  66                          0x147C),
  67           .driver_data = ATH9K_PCI_D3_L1_WAR },
  68         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  69                          0x002A,
  70                          0x10CF, /* Fujitsu */
  71                          0x147D),
  72           .driver_data = ATH9K_PCI_D3_L1_WAR },
  73         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  74                          0x002A,
  75                          0x10CF, /* Fujitsu */
  76                          0x1536),
  77           .driver_data = ATH9K_PCI_D3_L1_WAR },
  78
  79         /* AR9285 card for Asus */
  80         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  81                          0x002B,
  82                          PCI_VENDOR_ID_AZWAVE,
  83                          0x2C37),
  84           .driver_data = ATH9K_PCI_BT_ANT_DIV },
  85
  86         { PCI_VDEVICE(ATHEROS, 0x002B) }, /* PCI-E */
  87         { PCI_VDEVICE(ATHEROS, 0x002C) }, /* PCI-E 802.11n bonded out */
  88         { PCI_VDEVICE(ATHEROS, 0x002D) }, /* PCI   */
  89         { PCI_VDEVICE(ATHEROS, 0x002E) }, /* PCI-E */
  90         { PCI_VDEVICE(ATHEROS, 0x0030) }, /* PCI-E  AR9300 */
  91
  92         /* PCI-E CUS198 */
  93         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  94                          0x0032,
  95                          PCI_VENDOR_ID_AZWAVE,
  96                          0x2086),
  97           .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
  98         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
  99                          0x0032,
 100                          PCI_VENDOR_ID_AZWAVE,
 101                          0x1237),
 102           .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 103         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 104                          0x0032,
 105                          PCI_VENDOR_ID_AZWAVE,
 106                          0x2126),
 107           .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 108         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 109                          0x0032,
 110                          PCI_VENDOR_ID_AZWAVE,
 111                          0x126A),
 112           .driver_data = ATH9K_PCI_CUS198 | ATH9K_PCI_BT_ANT_DIV },
 113
 114         /* PCI-E CUS230 */
 115         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 116                          0x0032,
 117                          PCI_VENDOR_ID_AZWAVE,
 118                          0x2152),
 119           .driver_data = ATH9K_PCI_CUS230 | ATH9K_PCI_BT_ANT_DIV },
 120         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 121                          0x0032,
 122                          PCI_VENDOR_ID_FOXCONN,
 123                          0xE075),
 124           .driver_data = ATH9K_PCI_CUS230 | ATH9K_PCI_BT_ANT_DIV },
 125
 126         /* WB225 */
 127         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 128                          0x0032,
 129                          PCI_VENDOR_ID_ATHEROS,
 130                          0x3119),
 131           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 132         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 133                          0x0032,
 134                          PCI_VENDOR_ID_ATHEROS,
 135                          0x3122),
 136           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 137         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 138                          0x0032,
 139                          0x185F, /* WNC */
 140                          0x3119),
 141           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 142         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 143                          0x0032,
 144                          0x185F, /* WNC */
 145                          0x3027),
 146           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 147         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 148                          0x0032,
 149                          PCI_VENDOR_ID_SAMSUNG,
 150                          0x4105),
 151           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 152         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 153                          0x0032,
 154                          PCI_VENDOR_ID_SAMSUNG,
 155                          0x4106),
 156           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 157         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 158                          0x0032,
 159                          PCI_VENDOR_ID_SAMSUNG,
 160                          0x410D),
 161           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 162         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 163                          0x0032,
 164                          PCI_VENDOR_ID_SAMSUNG,
 165                          0x410E),
 166           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 167         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 168                          0x0032,
 169                          PCI_VENDOR_ID_SAMSUNG,
 170                          0x410F),
 171           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 172         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 173                          0x0032,
 174                          PCI_VENDOR_ID_SAMSUNG,
 175                          0xC706),
 176           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 177         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 178                          0x0032,
 179                          PCI_VENDOR_ID_SAMSUNG,
 180                          0xC680),
 181           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 182         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 183                          0x0032,
 184                          PCI_VENDOR_ID_SAMSUNG,
 185                          0xC708),
 186           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 187         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 188                          0x0032,
 189                          PCI_VENDOR_ID_LENOVO,
 190                          0x3218),
 191           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 192         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 193                          0x0032,
 194                          PCI_VENDOR_ID_LENOVO,
 195                          0x3219),
 196           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 197
 198         { PCI_VDEVICE(ATHEROS, 0x0032) }, /* PCI-E  AR9485 */
 199         { PCI_VDEVICE(ATHEROS, 0x0033) }, /* PCI-E  AR9580 */
 200
 201         /* PCI-E CUS217 */
 202         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 203                          0x0034,
 204                          PCI_VENDOR_ID_AZWAVE,
 205                          0x2116),
 206           .driver_data = ATH9K_PCI_CUS217 },
 207         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 208                          0x0034,
 209                          0x11AD, /* LITEON */
 210                          0x6661),
 211           .driver_data = ATH9K_PCI_CUS217 },
 212
 213         /* AR9462 with WoW support */
 214         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 215                          0x0034,
 216                          PCI_VENDOR_ID_ATHEROS,
 217                          0x3117),
 218           .driver_data = ATH9K_PCI_WOW },
 219         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 220                          0x0034,
 221                          PCI_VENDOR_ID_LENOVO,
 222                          0x3214),
 223           .driver_data = ATH9K_PCI_WOW },
 224         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 225                          0x0034,
 226                          PCI_VENDOR_ID_ATTANSIC,
 227                          0x0091),
 228           .driver_data = ATH9K_PCI_WOW },
 229         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 230                          0x0034,
 231                          PCI_VENDOR_ID_AZWAVE,
 232                          0x2110),
 233           .driver_data = ATH9K_PCI_WOW },
 234         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 235                          0x0034,
 236                          PCI_VENDOR_ID_ASUSTEK,
 237                          0x850E),
 238           .driver_data = ATH9K_PCI_WOW },
 239         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 240                          0x0034,
 241                          0x11AD, /* LITEON */
 242                          0x6631),
 243           .driver_data = ATH9K_PCI_WOW },
 244         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 245                          0x0034,
 246                          0x11AD, /* LITEON */
 247                          0x6641),
 248           .driver_data = ATH9K_PCI_WOW },
 249         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 250                          0x0034,
 251                          PCI_VENDOR_ID_HP,
 252                          0x1864),
 253           .driver_data = ATH9K_PCI_WOW },
 254         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 255                          0x0034,
 256                          0x14CD, /* USI */
 257                          0x0063),
 258           .driver_data = ATH9K_PCI_WOW },
 259         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 260                          0x0034,
 261                          0x14CD, /* USI */
 262                          0x0064),
 263           .driver_data = ATH9K_PCI_WOW },
 264         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 265                          0x0034,
 266                          0x10CF, /* Fujitsu */
 267                          0x1783),
 268           .driver_data = ATH9K_PCI_WOW },
 269
 270         { PCI_VDEVICE(ATHEROS, 0x0034) }, /* PCI-E  AR9462 */
 271         { PCI_VDEVICE(ATHEROS, 0x0037) }, /* PCI-E  AR1111/AR9485 */
 272
 273         /* CUS252 */
 274         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 275                          0x0036,
 276                          PCI_VENDOR_ID_ATHEROS,
 277                          0x3028),
 278           .driver_data = ATH9K_PCI_CUS252 | ATH9K_PCI_BT_ANT_DIV },
 279         { PCI_DEVICE_SUB(PCI_VENDOR_ID_ATHEROS,
 280                          0x0036,
 281                          PCI_VENDOR_ID_AZWAVE,
 282                          0x2176),
 283           .driver_data = ATH9K_PCI_CUS252 | ATH9K_PCI_BT_ANT_DIV },
 284
 285         /* PCI-E AR9565 (WB335) */
 286         { PCI_VDEVICE(ATHEROS, 0x0036),
 287           .driver_data = ATH9K_PCI_BT_ANT_DIV },
 288
 289         { 0 }
 290 };
 291
 292
 293 /* return bus cachesize in 4B word units */
 294 static void ath_pci_read_cachesize(struct ath_common *common, int *csz)
 295 {
 296         struct ath_softc *sc = (struct ath_softc *) common->priv;
 297         u8 u8tmp;
 298
 299         pci_read_config_byte(to_pci_dev(sc->dev), PCI_CACHE_LINE_SIZE, &u8tmp);
 300         *csz = (int)u8tmp;
 301
 302         /*
 303          * This check was put in to avoid "unpleasant" consequences if
 304          * the bootrom has not fully initialized all PCI devices.
 305          * Sometimes the cache line size register is not set
 306          */
 307
 308         if (*csz == 0)
 309                 *csz = DEFAULT_CACHELINE >> 2;   /* Use the default size */
 310 }
 311
 312 static bool ath_pci_eeprom_read(struct ath_common *common, u32 off, u16 *data)
 313 {
 314         struct ath_softc *sc = (struct ath_softc *) common->priv;
 315         struct ath9k_platform_data *pdata = sc->dev->platform_data;
 316
 317         if (pdata) {
 318                 if (off >= (ARRAY_SIZE(pdata->eeprom_data))) {
 319                         ath_err(common,
 320                                 "%s: eeprom read failed, offset %08x is out of range\n",
 321                                 __func__, off);
 322                 }
 323
 324                 *data = pdata->eeprom_data[off];
 325         } else {
 326                 struct ath_hw *ah = (struct ath_hw *) common->ah;
 327
 328                 common->ops->read(ah, AR5416_EEPROM_OFFSET +
 329                                       (off << AR5416_EEPROM_S));
 330
 331                 if (!ath9k_hw_wait(ah,
 332                                    AR_EEPROM_STATUS_DATA,
 333                                    AR_EEPROM_STATUS_DATA_BUSY |
 334                                    AR_EEPROM_STATUS_DATA_PROT_ACCESS, 0,
 335                                    AH_WAIT_TIMEOUT)) {
 336                         return false;
 337                 }
 338
 339                 *data = MS(common->ops->read(ah, AR_EEPROM_STATUS_DATA),
 340                            AR_EEPROM_STATUS_DATA_VAL);
 341         }
 342
 343         return true;
 344 }
 345
 346 /* Need to be called after we discover btcoex capabilities */
 347 static void ath_pci_aspm_init(struct ath_common *common)
 348 {
 349         struct ath_softc *sc = (struct ath_softc *) common->priv;
 350         struct ath_hw *ah = sc->sc_ah;
 351         struct pci_dev *pdev = to_pci_dev(sc->dev);
 352         struct pci_dev *parent;
 353         u16 aspm;
 354
 355         if (!ah->is_pciexpress)
 356                 return;
 357
 358         parent = pdev->bus->self;
 359         if (!parent)
 360                 return;
 361
 362         if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
 363             (AR_SREV_9285(ah))) {
 364                 /* Bluetooth coexistence requires disabling ASPM. */
 365                 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL,
 366                         PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1);
 367
 368                 /*
 369                  * Both upstream and downstream PCIe components should
 370                  * have the same ASPM settings.
 371                  */
 372                 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL,
 373                         PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1);
 374
 375                 ath_info(common, "Disabling ASPM since BTCOEX is enabled\n");
 376                 return;
 377         }
 378
 379         /*
 380          * 0x70c - Ack Frequency Register.
 381          *
 382          * Bits 27:29 - DEFAULT_L1_ENTRANCE_LATENCY.
 383          *
 384          * 000 : 1 us
 385          * 001 : 2 us
 386          * 010 : 4 us
 387          * 011 : 8 us
 388          * 100 : 16 us
 389          * 101 : 32 us
 390          * 110/111 : 64 us
 391          */
 392         if (AR_SREV_9462(ah))
 393                 pci_read_config_dword(pdev, 0x70c, &ah->config.aspm_l1_fix);
 394
 395         pcie_capability_read_word(parent, PCI_EXP_LNKCTL, &aspm);
 396         if (aspm & (PCI_EXP_LNKCTL_ASPM_L0S | PCI_EXP_LNKCTL_ASPM_L1)) {
 397                 ah->aspm_enabled = true;
 398                 /* Initialize PCIe PM and SERDES registers. */
 399                 ath9k_hw_configpcipowersave(ah, false);
 400                 ath_info(common, "ASPM enabled: 0x%x\n", aspm);
 401         }
 402 }
 403
 404 static const struct ath_bus_ops ath_pci_bus_ops = {
 405         .ath_bus_type = ATH_PCI,
 406         .read_cachesize = ath_pci_read_cachesize,
 407         .eeprom_read = ath_pci_eeprom_read,
 408         .aspm_init = ath_pci_aspm_init,
 409 };
 410
 411 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 412 {
 413         struct ath_softc *sc;
 414         struct ieee80211_hw *hw;
 415         u8 csz;
 416         u32 val;
 417         int ret = 0;
 418         char hw_name[64];
 419
 420         if (pcim_enable_device(pdev))
 421                 return -EIO;
 422
 423         ret =  pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 424         if (ret) {
 425                 pr_err("32-bit DMA not available\n");
 426                 return ret;
 427         }
 428
 429         ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 430         if (ret) {
 431                 pr_err("32-bit DMA consistent DMA enable failed\n");
 432                 return ret;
 433         }
 434
 435         /*
 436          * Cache line size is used to size and align various
 437          * structures used to communicate with the hardware.
 438          */
 439         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
 440         if (csz == 0) {
 441                 /*
 442                  * Linux 2.4.18 (at least) writes the cache line size
 443                  * register as a 16-bit wide register which is wrong.
 444                  * We must have this setup properly for rx buffer
 445                  * DMA to work so force a reasonable value here if it
 446                  * comes up zero.
 447                  */
 448                 csz = L1_CACHE_BYTES / sizeof(u32);
 449                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
 450         }
 451         /*
 452          * The default setting of latency timer yields poor results,
 453          * set it to the value used by other systems. It may be worth
 454          * tweaking this setting more.
 455          */
 456         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
 457
 458         pci_set_master(pdev);
 459
 460         /*
 461          * Disable the RETRY_TIMEOUT register (0x41) to keep
 462          * PCI Tx retries from interfering with C3 CPU state.
 463          */
 464         pci_read_config_dword(pdev, 0x40, &val);
 465         if ((val & 0x0000ff00) != 0)
 466                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
 467
 468         ret = pcim_iomap_regions(pdev, BIT(0), "ath9k");
 469         if (ret) {
 470                 dev_err(&pdev->dev, "PCI memory region reserve error\n");
 471                 return -ENODEV;
 472         }
 473
 474         hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops);
 475         if (!hw) {
 476                 dev_err(&pdev->dev, "No memory for ieee80211_hw\n");
 477                 return -ENOMEM;
 478         }
 479
 480         SET_IEEE80211_DEV(hw, &pdev->dev);
 481         pci_set_drvdata(pdev, hw);
 482
 483         sc = hw->priv;
 484         sc->hw = hw;
 485         sc->dev = &pdev->dev;
 486         sc->mem = pcim_iomap_table(pdev)[0];
 487         sc->driver_data = id->driver_data;
 488
 489         /* Will be cleared in ath9k_start() */
 490         set_bit(SC_OP_INVALID, &sc->sc_flags);
 491
 492         ret = request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath9k", sc);
 493         if (ret) {
 494                 dev_err(&pdev->dev, "request_irq failed\n");
 495                 goto err_irq;
 496         }
 497
 498         sc->irq = pdev->irq;
 499
 500         ret = ath9k_init_device(id->device, sc, &ath_pci_bus_ops);
 501         if (ret) {
 502                 dev_err(&pdev->dev, "Failed to initialize device\n");
 503                 goto err_init;
 504         }
 505
 506         ath9k_hw_name(sc->sc_ah, hw_name, sizeof(hw_name));
 507         wiphy_info(hw->wiphy, "%s mem=0x%lx, irq=%d\n",
 508                    hw_name, (unsigned long)sc->mem, pdev->irq);
 509
 510         return 0;
 511
 512 err_init:
 513         free_irq(sc->irq, sc);
 514 err_irq:
 515         ieee80211_free_hw(hw);
 516         return ret;
 517 }
 518
 519 static void ath_pci_remove(struct pci_dev *pdev)
 520 {
 521         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
 522         struct ath_softc *sc = hw->priv;
 523
 524         if (!is_ath9k_unloaded)
 525                 sc->sc_ah->ah_flags |= AH_UNPLUGGED;
 526         ath9k_deinit_device(sc);
 527         free_irq(sc->irq, sc);
 528         ieee80211_free_hw(sc->hw);
 529 }
 530
 531 #ifdef CONFIG_PM_SLEEP
 532
 533 static int ath_pci_suspend(struct device *device)
 534 {
 535         struct pci_dev *pdev = to_pci_dev(device);
 536         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
 537         struct ath_softc *sc = hw->priv;
 538
 539         if (sc->wow_enabled)
 540                 return 0;
 541
 542         /* The device has to be moved to FULLSLEEP forcibly.
 543          * Otherwise the chip never moved to full sleep,
 544          * when no interface is up.
 545          */
 546         ath9k_stop_btcoex(sc);
 547         ath9k_hw_disable(sc->sc_ah);
 548         ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP);
 549
 550         return 0;
 551 }
 552
 553 static int ath_pci_resume(struct device *device)
 554 {
 555         struct pci_dev *pdev = to_pci_dev(device);
 556         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
 557         struct ath_softc *sc = hw->priv;
 558         struct ath_hw *ah = sc->sc_ah;
 559         struct ath_common *common = ath9k_hw_common(ah);
 560         u32 val;
 561
 562         /*
 563          * Suspend/Resume resets the PCI configuration space, so we have to
 564          * re-disable the RETRY_TIMEOUT register (0x41) to keep
 565          * PCI Tx retries from interfering with C3 CPU state
 566          */
 567         pci_read_config_dword(pdev, 0x40, &val);
 568         if ((val & 0x0000ff00) != 0)
 569                 pci_write_config_dword(pdev, 0x40, val & 0xffff00ff);
 570
 571         ath_pci_aspm_init(common);
 572         ah->reset_power_on = false;
 573
 574         return 0;
 575 }
 576
 577 static SIMPLE_DEV_PM_OPS(ath9k_pm_ops, ath_pci_suspend, ath_pci_resume);
 578
 579 #define ATH9K_PM_OPS    (&ath9k_pm_ops)
 580
 581 #else /* !CONFIG_PM_SLEEP */
 582
 583 #define ATH9K_PM_OPS    NULL
 584
 585 #endif /* !CONFIG_PM_SLEEP */
 586
 587
 588 MODULE_DEVICE_TABLE(pci, ath_pci_id_table);
 589
 590 static struct pci_driver ath_pci_driver = {
 591         .name       = "ath9k",
 592         .id_table   = ath_pci_id_table,
 593         .probe      = ath_pci_probe,
 594         .remove     = ath_pci_remove,
 595         .driver.pm  = ATH9K_PM_OPS,
 596 };
 597
 598 int ath_pci_init(void)
 599 {
 600         return pci_register_driver(&ath_pci_driver);
 601 }
 602
 603 void ath_pci_exit(void)
 604 {
 605         pci_unregister_driver(&ath_pci_driver);
 606 }