drivers/net/wireless/iwlwifi/iwl-pci.c

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2007 - 2012 Intel Corporation. All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
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  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called LICENSE.GPL.
  26  *
  27  * Contact Information:
  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  30  *
  31  * BSD LICENSE
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  33  * Copyright(c) 2005 - 2012 Intel Corporation. All rights reserved.
  34  * All rights reserved.
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  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
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  41  *    notice, this list of conditions and the following disclaimer.
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  44  *    the documentation and/or other materials provided with the
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  47  *    contributors may be used to endorse or promote products derived
  48  *    from this software without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  51  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  52  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  53  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  54  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  55  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  56  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  57  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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  59  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  61  *
  62  *****************************************************************************/
  63 #include <linux/module.h>
  64 #include <linux/pci.h>
  65 #include <linux/pci-aspm.h>
  66
  67 #include "iwl-bus.h"
  68 #include "iwl-io.h"
  69 #include "iwl-shared.h"
  70 #include "iwl-trans.h"
  71 #include "iwl-csr.h"
  72 #include "iwl-cfg.h"
  73
  74 #define IWL_PCI_DEVICE(dev, subdev, cfg) \
  75         .vendor = PCI_VENDOR_ID_INTEL,  .device = (dev), \
  76         .subvendor = PCI_ANY_ID, .subdevice = (subdev), \
  77         .driver_data = (kernel_ulong_t)&(cfg)
  78
  79 /* Hardware specific file defines the PCI IDs table for that hardware module */
  80 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
  81         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
  82         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
  83         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
  84         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
  85         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
  86         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
  87         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
  88         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
  89         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
  90         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
  91         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
  92         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
  93         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
  94         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
  95         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
  96         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
  97         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
  98         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
  99         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
 100         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
 101         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
 102         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
 103         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
 104         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
 105
 106 /* 5300 Series WiFi */
 107         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
 108         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
 109         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
 110         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
 111         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
 112         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
 113         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
 114         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
 115         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
 116         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
 117         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
 118         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
 119
 120 /* 5350 Series WiFi/WiMax */
 121         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
 122         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
 123         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
 124
 125 /* 5150 Series Wifi/WiMax */
 126         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
 127         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
 128         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
 129         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
 130         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
 131         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
 132
 133         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
 134         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
 135         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
 136         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
 137
 138 /* 6x00 Series */
 139         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
 140         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
 141         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
 142         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
 143         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
 144         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
 145         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
 146         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
 147         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
 148         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
 149
 150 /* 6x05 Series */
 151         {IWL_PCI_DEVICE(0x0082, 0x1301, iwl6005_2agn_cfg)},
 152         {IWL_PCI_DEVICE(0x0082, 0x1306, iwl6005_2abg_cfg)},
 153         {IWL_PCI_DEVICE(0x0082, 0x1307, iwl6005_2bg_cfg)},
 154         {IWL_PCI_DEVICE(0x0082, 0x1321, iwl6005_2agn_cfg)},
 155         {IWL_PCI_DEVICE(0x0082, 0x1326, iwl6005_2abg_cfg)},
 156         {IWL_PCI_DEVICE(0x0085, 0x1311, iwl6005_2agn_cfg)},
 157         {IWL_PCI_DEVICE(0x0085, 0x1316, iwl6005_2abg_cfg)},
 158         {IWL_PCI_DEVICE(0x0082, 0xC020, iwl6005_2agn_sff_cfg)},
 159         {IWL_PCI_DEVICE(0x0085, 0xC220, iwl6005_2agn_sff_cfg)},
 160         {IWL_PCI_DEVICE(0x0082, 0x1341, iwl6005_2agn_d_cfg)},
 161         {IWL_PCI_DEVICE(0x0082, 0x1304, iwl6005_2agn_cfg)},/* low 5GHz active */
 162         {IWL_PCI_DEVICE(0x0082, 0x1305, iwl6005_2agn_cfg)},/* high 5GHz active */
 163
 164 /* 6x30 Series */
 165         {IWL_PCI_DEVICE(0x008A, 0x5305, iwl1030_bgn_cfg)},
 166         {IWL_PCI_DEVICE(0x008A, 0x5307, iwl1030_bg_cfg)},
 167         {IWL_PCI_DEVICE(0x008A, 0x5325, iwl1030_bgn_cfg)},
 168         {IWL_PCI_DEVICE(0x008A, 0x5327, iwl1030_bg_cfg)},
 169         {IWL_PCI_DEVICE(0x008B, 0x5315, iwl1030_bgn_cfg)},
 170         {IWL_PCI_DEVICE(0x008B, 0x5317, iwl1030_bg_cfg)},
 171         {IWL_PCI_DEVICE(0x0090, 0x5211, iwl6030_2agn_cfg)},
 172         {IWL_PCI_DEVICE(0x0090, 0x5215, iwl6030_2bgn_cfg)},
 173         {IWL_PCI_DEVICE(0x0090, 0x5216, iwl6030_2abg_cfg)},
 174         {IWL_PCI_DEVICE(0x0091, 0x5201, iwl6030_2agn_cfg)},
 175         {IWL_PCI_DEVICE(0x0091, 0x5205, iwl6030_2bgn_cfg)},
 176         {IWL_PCI_DEVICE(0x0091, 0x5206, iwl6030_2abg_cfg)},
 177         {IWL_PCI_DEVICE(0x0091, 0x5207, iwl6030_2bg_cfg)},
 178         {IWL_PCI_DEVICE(0x0091, 0x5221, iwl6030_2agn_cfg)},
 179         {IWL_PCI_DEVICE(0x0091, 0x5225, iwl6030_2bgn_cfg)},
 180         {IWL_PCI_DEVICE(0x0091, 0x5226, iwl6030_2abg_cfg)},
 181
 182 /* 6x50 WiFi/WiMax Series */
 183         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
 184         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
 185         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
 186         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
 187         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
 188         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
 189
 190 /* 6150 WiFi/WiMax Series */
 191         {IWL_PCI_DEVICE(0x0885, 0x1305, iwl6150_bgn_cfg)},
 192         {IWL_PCI_DEVICE(0x0885, 0x1307, iwl6150_bg_cfg)},
 193         {IWL_PCI_DEVICE(0x0885, 0x1325, iwl6150_bgn_cfg)},
 194         {IWL_PCI_DEVICE(0x0885, 0x1327, iwl6150_bg_cfg)},
 195         {IWL_PCI_DEVICE(0x0886, 0x1315, iwl6150_bgn_cfg)},
 196         {IWL_PCI_DEVICE(0x0886, 0x1317, iwl6150_bg_cfg)},
 197
 198 /* 1000 Series WiFi */
 199         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
 200         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
 201         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
 202         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
 203         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
 204         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
 205         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
 206         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
 207         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
 208         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
 209         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
 210         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
 211
 212 /* 100 Series WiFi */
 213         {IWL_PCI_DEVICE(0x08AE, 0x1005, iwl100_bgn_cfg)},
 214         {IWL_PCI_DEVICE(0x08AE, 0x1007, iwl100_bg_cfg)},
 215         {IWL_PCI_DEVICE(0x08AF, 0x1015, iwl100_bgn_cfg)},
 216         {IWL_PCI_DEVICE(0x08AF, 0x1017, iwl100_bg_cfg)},
 217         {IWL_PCI_DEVICE(0x08AE, 0x1025, iwl100_bgn_cfg)},
 218         {IWL_PCI_DEVICE(0x08AE, 0x1027, iwl100_bg_cfg)},
 219
 220 /* 130 Series WiFi */
 221         {IWL_PCI_DEVICE(0x0896, 0x5005, iwl130_bgn_cfg)},
 222         {IWL_PCI_DEVICE(0x0896, 0x5007, iwl130_bg_cfg)},
 223         {IWL_PCI_DEVICE(0x0897, 0x5015, iwl130_bgn_cfg)},
 224         {IWL_PCI_DEVICE(0x0897, 0x5017, iwl130_bg_cfg)},
 225         {IWL_PCI_DEVICE(0x0896, 0x5025, iwl130_bgn_cfg)},
 226         {IWL_PCI_DEVICE(0x0896, 0x5027, iwl130_bg_cfg)},
 227
 228 /* 2x00 Series */
 229         {IWL_PCI_DEVICE(0x0890, 0x4022, iwl2000_2bgn_cfg)},
 230         {IWL_PCI_DEVICE(0x0891, 0x4222, iwl2000_2bgn_cfg)},
 231         {IWL_PCI_DEVICE(0x0890, 0x4422, iwl2000_2bgn_cfg)},
 232         {IWL_PCI_DEVICE(0x0890, 0x4822, iwl2000_2bgn_d_cfg)},
 233
 234 /* 2x30 Series */
 235         {IWL_PCI_DEVICE(0x0887, 0x4062, iwl2030_2bgn_cfg)},
 236         {IWL_PCI_DEVICE(0x0888, 0x4262, iwl2030_2bgn_cfg)},
 237         {IWL_PCI_DEVICE(0x0887, 0x4462, iwl2030_2bgn_cfg)},
 238
 239 /* 6x35 Series */
 240         {IWL_PCI_DEVICE(0x088E, 0x4060, iwl6035_2agn_cfg)},
 241         {IWL_PCI_DEVICE(0x088F, 0x4260, iwl6035_2agn_cfg)},
 242         {IWL_PCI_DEVICE(0x088E, 0x4460, iwl6035_2agn_cfg)},
 243
 244 /* 105 Series */
 245         {IWL_PCI_DEVICE(0x0894, 0x0022, iwl105_bgn_cfg)},
 246         {IWL_PCI_DEVICE(0x0895, 0x0222, iwl105_bgn_cfg)},
 247         {IWL_PCI_DEVICE(0x0894, 0x0422, iwl105_bgn_cfg)},
 248         {IWL_PCI_DEVICE(0x0894, 0x0822, iwl105_bgn_d_cfg)},
 249
 250 /* 135 Series */
 251         {IWL_PCI_DEVICE(0x0892, 0x0062, iwl135_bgn_cfg)},
 252         {IWL_PCI_DEVICE(0x0893, 0x0262, iwl135_bgn_cfg)},
 253         {IWL_PCI_DEVICE(0x0892, 0x0462, iwl135_bgn_cfg)},
 254
 255         {0}
 256 };
 257 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
 258
 259 /* PCI registers */
 260 #define PCI_CFG_RETRY_TIMEOUT   0x041
 261
 262 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 263 {
 264         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
 265         struct iwl_bus *bus;
 266         int err;
 267
 268         bus = kzalloc(sizeof(*bus), GFP_KERNEL);
 269         if (!bus) {
 270                 dev_printk(KERN_ERR, &pdev->dev,
 271                            "Couldn't allocate iwl_pci_bus");
 272                 return -ENOMEM;
 273         }
 274
 275         bus->shrd = kzalloc(sizeof(*bus->shrd), GFP_KERNEL);
 276         if (!bus->shrd) {
 277                 dev_printk(KERN_ERR, &pdev->dev,
 278                            "Couldn't allocate iwl_shared");
 279                 err = -ENOMEM;
 280                 goto out_free_bus;
 281         }
 282
 283         bus->shrd->bus = bus;
 284
 285         pci_set_drvdata(pdev, bus);
 286
 287 #ifdef CONFIG_IWLWIFI_IDI
 288         trans(bus) = iwl_trans_idi_alloc(bus->shrd, pdev, ent);
 289         if (trans(bus) == NULL) {
 290                 err = -ENOMEM;
 291                 goto out_free_bus;
 292         }
 293
 294         err = iwl_probe(bus, &trans_ops_idi, cfg);
 295 #else
 296         trans(bus) = iwl_trans_pcie_alloc(bus->shrd, pdev, ent);
 297         if (trans(bus) == NULL) {
 298                 err = -ENOMEM;
 299                 goto out_free_bus;
 300         }
 301
 302         err = iwl_probe(bus, &trans_ops_pcie, cfg);
 303 #endif
 304         if (err)
 305                 goto out_free_trans;
 306
 307         return 0;
 308
 309 out_free_trans:
 310         iwl_trans_free(trans(bus));
 311         pci_set_drvdata(pdev, NULL);
 312 out_free_bus:
 313         kfree(bus->shrd);
 314         kfree(bus);
 315         return err;
 316 }
 317
 318 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
 319 {
 320         struct iwl_bus *bus = pci_get_drvdata(pdev);
 321         struct iwl_shared *shrd = bus->shrd;
 322
 323         iwl_remove(shrd->priv);
 324         iwl_trans_free(shrd->trans);
 325
 326         pci_set_drvdata(pdev, NULL);
 327
 328         kfree(bus->shrd);
 329         kfree(bus);
 330 }
 331
 332 #ifdef CONFIG_PM_SLEEP
 333
 334 static int iwl_pci_suspend(struct device *device)
 335 {
 336         struct pci_dev *pdev = to_pci_dev(device);
 337         struct iwl_bus *bus = pci_get_drvdata(pdev);
 338         struct iwl_shared *shrd = bus->shrd;
 339
 340         /* Before you put code here, think about WoWLAN. You cannot check here
 341          * whether WoWLAN is enabled or not, and your code will run even if
 342          * WoWLAN is enabled - don't kill the NIC, someone may need it in Sx.
 343          */
 344
 345         return iwl_trans_suspend(shrd->trans);
 346 }
 347
 348 static int iwl_pci_resume(struct device *device)
 349 {
 350         struct pci_dev *pdev = to_pci_dev(device);
 351         struct iwl_bus *bus = pci_get_drvdata(pdev);
 352         struct iwl_shared *shrd = bus->shrd;
 353
 354         /* Before you put code here, think about WoWLAN. You cannot check here
 355          * whether WoWLAN is enabled or not, and your code will run even if
 356          * WoWLAN is enabled - the NIC may be alive.
 357          */
 358
 359         /*
 360          * We disable the RETRY_TIMEOUT register (0x41) to keep
 361          * PCI Tx retries from interfering with C3 CPU state.
 362          */
 363         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
 364
 365         return iwl_trans_resume(shrd->trans);
 366 }
 367
 368 static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
 369
 370 #define IWL_PM_OPS      (&iwl_dev_pm_ops)
 371
 372 #else
 373
 374 #define IWL_PM_OPS      NULL
 375
 376 #endif
 377
 378 static struct pci_driver iwl_pci_driver = {
 379         .name = DRV_NAME,
 380         .id_table = iwl_hw_card_ids,
 381         .probe = iwl_pci_probe,
 382         .remove = __devexit_p(iwl_pci_remove),
 383         .driver.pm = IWL_PM_OPS,
 384 };
 385
 386 int __must_check iwl_pci_register_driver(void)
 387 {
 388         int ret;
 389         ret = pci_register_driver(&iwl_pci_driver);
 390         if (ret)
 391                 pr_err("Unable to initialize PCI module\n");
 392
 393         return ret;
 394 }
 395
 396 void iwl_pci_unregister_driver(void)
 397 {
 398         pci_unregister_driver(&iwl_pci_driver);
 399 }