LXR linux/drivers/net/wireless/iwlwifi/pcie/drv.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 - 2013 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
  20 * along with this program; if not, write to the Free Software
  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 COPYING.
  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
  32 *
  33 * Copyright(c) 2005 - 2013 Intel Corporation. All rights reserved.
  34 * All rights reserved.
  35 *
  36 * Redistribution and use in source and binary forms, with or without
  37 * modification, are permitted provided that the following conditions
  38 * are met:
  39 *
  40 *  * Redistributions of source code must retain the above copyright
  41 *    notice, this list of conditions and the following disclaimer.
  42 *  * Redistributions in binary form must reproduce the above copyright
  43 *    notice, this list of conditions and the following disclaimer in
  44 *    the documentation and/or other materials provided with the
  45 *    distribution.
  46 *  * Neither the name Intel Corporation nor the names of its
  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
  58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  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
  64#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  65
  66#include <linux/module.h>
  67#include <linux/pci.h>
  68#include <linux/pci-aspm.h>
  69
  70#include "iwl-trans.h"
  71#include "iwl-drv.h"
  72#include "internal.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 */
  80static 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, 0x4820, iwl6005_2agn_d_cfg)},
 161        {IWL_PCI_DEVICE(0x0082, 0x1304, iwl6005_2agn_mow1_cfg)},/* low 5GHz active */
 162        {IWL_PCI_DEVICE(0x0082, 0x1305, iwl6005_2agn_mow2_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        {IWL_PCI_DEVICE(0x088E, 0x4860, iwl6035_2agn_cfg)},
 244        {IWL_PCI_DEVICE(0x088F, 0x5260, iwl6035_2agn_cfg)},
 245
 246/* 105 Series */
 247        {IWL_PCI_DEVICE(0x0894, 0x0022, iwl105_bgn_cfg)},
 248        {IWL_PCI_DEVICE(0x0895, 0x0222, iwl105_bgn_cfg)},
 249        {IWL_PCI_DEVICE(0x0894, 0x0422, iwl105_bgn_cfg)},
 250        {IWL_PCI_DEVICE(0x0894, 0x0822, iwl105_bgn_d_cfg)},
 251
 252/* 135 Series */
 253        {IWL_PCI_DEVICE(0x0892, 0x0062, iwl135_bgn_cfg)},
 254        {IWL_PCI_DEVICE(0x0893, 0x0262, iwl135_bgn_cfg)},
 255        {IWL_PCI_DEVICE(0x0892, 0x0462, iwl135_bgn_cfg)},
 256
 257/* 7000 Series */
 258        {IWL_PCI_DEVICE(0x08B1, 0x4070, iwl7260_2ac_cfg)},
 259        {IWL_PCI_DEVICE(0x08B1, 0x4062, iwl7260_2ac_cfg)},
 260        {IWL_PCI_DEVICE(0x08B1, 0xC070, iwl7260_2ac_cfg)},
 261        {IWL_PCI_DEVICE(0x08B3, 0x0070, iwl3160_ac_cfg)},
 262        {IWL_PCI_DEVICE(0x08B3, 0x8070, iwl3160_ac_cfg)},
 263
 264        {0}
 265};
 266MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
 267
 268/* PCI registers */
 269#define PCI_CFG_RETRY_TIMEOUT   0x041
 270
 271static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 272{
 273        const struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
 274        struct iwl_trans *iwl_trans;
 275        struct iwl_trans_pcie *trans_pcie;
 276        int ret;
 277
 278        iwl_trans = iwl_trans_pcie_alloc(pdev, ent, cfg);
 279        if (iwl_trans == NULL)
 280                return -ENOMEM;
 281
 282        pci_set_drvdata(pdev, iwl_trans);
 283
 284        trans_pcie = IWL_TRANS_GET_PCIE_TRANS(iwl_trans);
 285        trans_pcie->drv = iwl_drv_start(iwl_trans, cfg);
 286
 287        if (IS_ERR_OR_NULL(trans_pcie->drv)) {
 288                ret = PTR_ERR(trans_pcie->drv);
 289                goto out_free_trans;
 290        }
 291
 292        /* register transport layer debugfs here */
 293        ret = iwl_trans_dbgfs_register(iwl_trans, iwl_trans->dbgfs_dir);
 294        if (ret)
 295                goto out_free_drv;
 296
 297        return 0;
 298
 299out_free_drv:
 300        iwl_drv_stop(trans_pcie->drv);
 301out_free_trans:
 302        iwl_trans_pcie_free(iwl_trans);
 303        pci_set_drvdata(pdev, NULL);
 304        return ret;
 305}
 306
 307static void iwl_pci_remove(struct pci_dev *pdev)
 308{
 309        struct iwl_trans *trans = pci_get_drvdata(pdev);
 310        struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 311
 312        iwl_drv_stop(trans_pcie->drv);
 313        iwl_trans_pcie_free(trans);
 314
 315        pci_set_drvdata(pdev, NULL);
 316}
 317
 318#ifdef CONFIG_PM_SLEEP
 319
 320static int iwl_pci_suspend(struct device *device)
 321{
 322        struct pci_dev *pdev = to_pci_dev(device);
 323        struct iwl_trans *iwl_trans = pci_get_drvdata(pdev);
 324
 325        /* Before you put code here, think about WoWLAN. You cannot check here
 326         * whether WoWLAN is enabled or not, and your code will run even if
 327         * WoWLAN is enabled - don't kill the NIC, someone may need it in Sx.
 328         */
 329
 330        return iwl_trans_suspend(iwl_trans);
 331}
 332
 333static int iwl_pci_resume(struct device *device)
 334{
 335        struct pci_dev *pdev = to_pci_dev(device);
 336        struct iwl_trans *iwl_trans = pci_get_drvdata(pdev);
 337
 338        /* Before you put code here, think about WoWLAN. You cannot check here
 339         * whether WoWLAN is enabled or not, and your code will run even if
 340         * WoWLAN is enabled - the NIC may be alive.
 341         */
 342
 343        /*
 344         * We disable the RETRY_TIMEOUT register (0x41) to keep
 345         * PCI Tx retries from interfering with C3 CPU state.
 346         */
 347        pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
 348
 349        return iwl_trans_resume(iwl_trans);
 350}
 351
 352static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
 353
 354#define IWL_PM_OPS      (&iwl_dev_pm_ops)
 355
 356#else
 357
 358#define IWL_PM_OPS      NULL
 359
 360#endif
 361
 362static struct pci_driver iwl_pci_driver = {
 363        .name = DRV_NAME,
 364        .id_table = iwl_hw_card_ids,
 365        .probe = iwl_pci_probe,
 366        .remove = iwl_pci_remove,
 367        .driver.pm = IWL_PM_OPS,
 368};
 369
 370int __must_check iwl_pci_register_driver(void)
 371{
 372        int ret;
 373        ret = pci_register_driver(&iwl_pci_driver);
 374        if (ret)
 375                pr_err("Unable to initialize PCI module\n");
 376
 377        return ret;
 378}
 379
 380void iwl_pci_unregister_driver(void)
 381{
 382        pci_unregister_driver(&iwl_pci_driver);
 383}
 384