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

   1 /******************************************************************************
   2  *
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   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  *
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  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
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  41  *    notice, this list of conditions and the following disclaimer.
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  43  *    notice, this list of conditions and the following disclaimer in
  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
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  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 #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 /* PCI registers */
  75 #define PCI_CFG_RETRY_TIMEOUT   0x041
  76 #define PCI_CFG_LINK_CTRL_VAL_L0S_EN    0x01
  77 #define PCI_CFG_LINK_CTRL_VAL_L1_EN     0x02
  78
  79 struct iwl_pci_bus {
  80         /* basic pci-network driver stuff */
  81         struct pci_dev *pci_dev;
  82 };
  83
  84 #define IWL_BUS_GET_PCI_BUS(_iwl_bus) \
  85                         ((struct iwl_pci_bus *) ((_iwl_bus)->bus_specific))
  86
  87 #define IWL_BUS_GET_PCI_DEV(_iwl_bus) \
  88                         ((IWL_BUS_GET_PCI_BUS(_iwl_bus))->pci_dev)
  89
  90 static u32 iwl_pci_get_hw_id(struct iwl_bus *bus)
  91 {
  92         struct pci_dev *pci_dev = IWL_BUS_GET_PCI_DEV(bus);
  93
  94         return (pci_dev->device << 16) + pci_dev->subsystem_device;
  95 }
  96
  97 static const struct iwl_bus_ops bus_ops_pci = {
  98         .get_hw_id = iwl_pci_get_hw_id,
  99 };
 100
 101 #define IWL_PCI_DEVICE(dev, subdev, cfg) \
 102         .vendor = PCI_VENDOR_ID_INTEL,  .device = (dev), \
 103         .subvendor = PCI_ANY_ID, .subdevice = (subdev), \
 104         .driver_data = (kernel_ulong_t)&(cfg)
 105
 106 /* Hardware specific file defines the PCI IDs table for that hardware module */
 107 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
 108         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
 109         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
 110         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
 111         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
 112         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
 113         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
 114         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
 115         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
 116         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
 117         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
 118         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
 119         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
 120         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
 121         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
 122         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
 123         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
 124         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
 125         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
 126         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
 127         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
 128         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
 129         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
 130         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
 131         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
 132
 133 /* 5300 Series WiFi */
 134         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
 135         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
 136         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
 137         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
 138         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
 139         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
 140         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
 141         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
 142         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
 143         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
 144         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
 145         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
 146
 147 /* 5350 Series WiFi/WiMax */
 148         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
 149         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
 150         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
 151
 152 /* 5150 Series Wifi/WiMax */
 153         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
 154         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
 155         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
 156         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
 157         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
 158         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
 159
 160         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
 161         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
 162         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
 163         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
 164
 165 /* 6x00 Series */
 166         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
 167         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
 168         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
 169         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
 170         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
 171         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
 172         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
 173         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
 174         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
 175         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
 176
 177 /* 6x05 Series */
 178         {IWL_PCI_DEVICE(0x0082, 0x1301, iwl6005_2agn_cfg)},
 179         {IWL_PCI_DEVICE(0x0082, 0x1306, iwl6005_2abg_cfg)},
 180         {IWL_PCI_DEVICE(0x0082, 0x1307, iwl6005_2bg_cfg)},
 181         {IWL_PCI_DEVICE(0x0082, 0x1321, iwl6005_2agn_cfg)},
 182         {IWL_PCI_DEVICE(0x0082, 0x1326, iwl6005_2abg_cfg)},
 183         {IWL_PCI_DEVICE(0x0085, 0x1311, iwl6005_2agn_cfg)},
 184         {IWL_PCI_DEVICE(0x0085, 0x1316, iwl6005_2abg_cfg)},
 185         {IWL_PCI_DEVICE(0x0082, 0xC020, iwl6005_2agn_sff_cfg)},
 186         {IWL_PCI_DEVICE(0x0085, 0xC220, iwl6005_2agn_sff_cfg)},
 187         {IWL_PCI_DEVICE(0x0082, 0x1341, iwl6005_2agn_d_cfg)},
 188         {IWL_PCI_DEVICE(0x0082, 0x1304, iwl6005_2agn_cfg)},/* low 5GHz active */
 189         {IWL_PCI_DEVICE(0x0082, 0x1305, iwl6005_2agn_cfg)},/* high 5GHz active */
 190
 191 /* 6x30 Series */
 192         {IWL_PCI_DEVICE(0x008A, 0x5305, iwl1030_bgn_cfg)},
 193         {IWL_PCI_DEVICE(0x008A, 0x5307, iwl1030_bg_cfg)},
 194         {IWL_PCI_DEVICE(0x008A, 0x5325, iwl1030_bgn_cfg)},
 195         {IWL_PCI_DEVICE(0x008A, 0x5327, iwl1030_bg_cfg)},
 196         {IWL_PCI_DEVICE(0x008B, 0x5315, iwl1030_bgn_cfg)},
 197         {IWL_PCI_DEVICE(0x008B, 0x5317, iwl1030_bg_cfg)},
 198         {IWL_PCI_DEVICE(0x0090, 0x5211, iwl6030_2agn_cfg)},
 199         {IWL_PCI_DEVICE(0x0090, 0x5215, iwl6030_2bgn_cfg)},
 200         {IWL_PCI_DEVICE(0x0090, 0x5216, iwl6030_2abg_cfg)},
 201         {IWL_PCI_DEVICE(0x0091, 0x5201, iwl6030_2agn_cfg)},
 202         {IWL_PCI_DEVICE(0x0091, 0x5205, iwl6030_2bgn_cfg)},
 203         {IWL_PCI_DEVICE(0x0091, 0x5206, iwl6030_2abg_cfg)},
 204         {IWL_PCI_DEVICE(0x0091, 0x5207, iwl6030_2bg_cfg)},
 205         {IWL_PCI_DEVICE(0x0091, 0x5221, iwl6030_2agn_cfg)},
 206         {IWL_PCI_DEVICE(0x0091, 0x5225, iwl6030_2bgn_cfg)},
 207         {IWL_PCI_DEVICE(0x0091, 0x5226, iwl6030_2abg_cfg)},
 208
 209 /* 6x50 WiFi/WiMax Series */
 210         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
 211         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
 212         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
 213         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
 214         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
 215         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
 216
 217 /* 6150 WiFi/WiMax Series */
 218         {IWL_PCI_DEVICE(0x0885, 0x1305, iwl6150_bgn_cfg)},
 219         {IWL_PCI_DEVICE(0x0885, 0x1307, iwl6150_bg_cfg)},
 220         {IWL_PCI_DEVICE(0x0885, 0x1325, iwl6150_bgn_cfg)},
 221         {IWL_PCI_DEVICE(0x0885, 0x1327, iwl6150_bg_cfg)},
 222         {IWL_PCI_DEVICE(0x0886, 0x1315, iwl6150_bgn_cfg)},
 223         {IWL_PCI_DEVICE(0x0886, 0x1317, iwl6150_bg_cfg)},
 224
 225 /* 1000 Series WiFi */
 226         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
 227         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
 228         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
 229         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
 230         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
 231         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
 232         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
 233         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
 234         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
 235         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
 236         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
 237         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
 238
 239 /* 100 Series WiFi */
 240         {IWL_PCI_DEVICE(0x08AE, 0x1005, iwl100_bgn_cfg)},
 241         {IWL_PCI_DEVICE(0x08AE, 0x1007, iwl100_bg_cfg)},
 242         {IWL_PCI_DEVICE(0x08AF, 0x1015, iwl100_bgn_cfg)},
 243         {IWL_PCI_DEVICE(0x08AF, 0x1017, iwl100_bg_cfg)},
 244         {IWL_PCI_DEVICE(0x08AE, 0x1025, iwl100_bgn_cfg)},
 245         {IWL_PCI_DEVICE(0x08AE, 0x1027, iwl100_bg_cfg)},
 246
 247 /* 130 Series WiFi */
 248         {IWL_PCI_DEVICE(0x0896, 0x5005, iwl130_bgn_cfg)},
 249         {IWL_PCI_DEVICE(0x0896, 0x5007, iwl130_bg_cfg)},
 250         {IWL_PCI_DEVICE(0x0897, 0x5015, iwl130_bgn_cfg)},
 251         {IWL_PCI_DEVICE(0x0897, 0x5017, iwl130_bg_cfg)},
 252         {IWL_PCI_DEVICE(0x0896, 0x5025, iwl130_bgn_cfg)},
 253         {IWL_PCI_DEVICE(0x0896, 0x5027, iwl130_bg_cfg)},
 254
 255 /* 2x00 Series */
 256         {IWL_PCI_DEVICE(0x0890, 0x4022, iwl2000_2bgn_cfg)},
 257         {IWL_PCI_DEVICE(0x0891, 0x4222, iwl2000_2bgn_cfg)},
 258         {IWL_PCI_DEVICE(0x0890, 0x4422, iwl2000_2bgn_cfg)},
 259         {IWL_PCI_DEVICE(0x0890, 0x4822, iwl2000_2bgn_d_cfg)},
 260
 261 /* 2x30 Series */
 262         {IWL_PCI_DEVICE(0x0887, 0x4062, iwl2030_2bgn_cfg)},
 263         {IWL_PCI_DEVICE(0x0888, 0x4262, iwl2030_2bgn_cfg)},
 264         {IWL_PCI_DEVICE(0x0887, 0x4462, iwl2030_2bgn_cfg)},
 265
 266 /* 6x35 Series */
 267         {IWL_PCI_DEVICE(0x088E, 0x4060, iwl6035_2agn_cfg)},
 268         {IWL_PCI_DEVICE(0x088F, 0x4260, iwl6035_2agn_cfg)},
 269         {IWL_PCI_DEVICE(0x088E, 0x4460, iwl6035_2agn_cfg)},
 270
 271 /* 105 Series */
 272         {IWL_PCI_DEVICE(0x0894, 0x0022, iwl105_bgn_cfg)},
 273         {IWL_PCI_DEVICE(0x0895, 0x0222, iwl105_bgn_cfg)},
 274         {IWL_PCI_DEVICE(0x0894, 0x0422, iwl105_bgn_cfg)},
 275         {IWL_PCI_DEVICE(0x0894, 0x0822, iwl105_bgn_d_cfg)},
 276
 277 /* 135 Series */
 278         {IWL_PCI_DEVICE(0x0892, 0x0062, iwl135_bgn_cfg)},
 279         {IWL_PCI_DEVICE(0x0893, 0x0262, iwl135_bgn_cfg)},
 280         {IWL_PCI_DEVICE(0x0892, 0x0462, iwl135_bgn_cfg)},
 281
 282         {0}
 283 };
 284 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
 285
 286 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 287 {
 288         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
 289         struct iwl_bus *bus;
 290         struct iwl_pci_bus *pci_bus;
 291         int err;
 292
 293         bus = kzalloc(sizeof(*bus) + sizeof(*pci_bus), GFP_KERNEL);
 294         if (!bus) {
 295                 dev_printk(KERN_ERR, &pdev->dev,
 296                            "Couldn't allocate iwl_pci_bus");
 297                 return -ENOMEM;
 298         }
 299
 300         bus->shrd = kzalloc(sizeof(*bus->shrd), GFP_KERNEL);
 301         if (!bus->shrd) {
 302                 dev_printk(KERN_ERR, &pdev->dev,
 303                            "Couldn't allocate iwl_shared");
 304                 err = -ENOMEM;
 305                 goto out_free_bus;
 306         }
 307
 308         bus->shrd->bus = bus;
 309         pci_bus = IWL_BUS_GET_PCI_BUS(bus);
 310         pci_bus->pci_dev = pdev;
 311
 312         pci_set_drvdata(pdev, bus);
 313
 314         bus->ops = &bus_ops_pci;
 315
 316 #ifdef CONFIG_IWLWIFI_IDI
 317         trans(bus) = iwl_trans_idi_alloc(bus->shrd, pdev, ent);
 318         if (trans(bus) == NULL) {
 319                 err = -ENOMEM;
 320                 goto out_free_bus;
 321         }
 322
 323         err = iwl_probe(bus, &trans_ops_idi, cfg);
 324 #else
 325         trans(bus) = iwl_trans_pcie_alloc(bus->shrd, pdev, ent);
 326         if (trans(bus) == NULL) {
 327                 err = -ENOMEM;
 328                 goto out_free_bus;
 329         }
 330
 331         err = iwl_probe(bus, &trans_ops_pcie, cfg);
 332 #endif
 333         if (err)
 334                 goto out_free_trans;
 335
 336         return 0;
 337
 338 out_free_trans:
 339         iwl_trans_free(trans(bus));
 340         pci_set_drvdata(pdev, NULL);
 341 out_free_bus:
 342         kfree(bus->shrd);
 343         kfree(bus);
 344         return err;
 345 }
 346
 347 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
 348 {
 349         struct iwl_bus *bus = pci_get_drvdata(pdev);
 350         struct iwl_shared *shrd = bus->shrd;
 351
 352         iwl_remove(shrd->priv);
 353         iwl_trans_free(shrd->trans);
 354
 355         pci_set_drvdata(pdev, NULL);
 356
 357         kfree(bus->shrd);
 358         kfree(bus);
 359 }
 360
 361 #ifdef CONFIG_PM_SLEEP
 362
 363 static int iwl_pci_suspend(struct device *device)
 364 {
 365         struct pci_dev *pdev = to_pci_dev(device);
 366         struct iwl_bus *bus = pci_get_drvdata(pdev);
 367         struct iwl_shared *shrd = bus->shrd;
 368
 369         /* Before you put code here, think about WoWLAN. You cannot check here
 370          * whether WoWLAN is enabled or not, and your code will run even if
 371          * WoWLAN is enabled - don't kill the NIC, someone may need it in Sx.
 372          */
 373
 374         return iwl_trans_suspend(shrd->trans);
 375 }
 376
 377 static int iwl_pci_resume(struct device *device)
 378 {
 379         struct pci_dev *pdev = to_pci_dev(device);
 380         struct iwl_bus *bus = pci_get_drvdata(pdev);
 381         struct iwl_shared *shrd = bus->shrd;
 382
 383         /* Before you put code here, think about WoWLAN. You cannot check here
 384          * whether WoWLAN is enabled or not, and your code will run even if
 385          * WoWLAN is enabled - the NIC may be alive.
 386          */
 387
 388         /*
 389          * We disable the RETRY_TIMEOUT register (0x41) to keep
 390          * PCI Tx retries from interfering with C3 CPU state.
 391          */
 392         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
 393
 394         return iwl_trans_resume(shrd->trans);
 395 }
 396
 397 static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
 398
 399 #define IWL_PM_OPS      (&iwl_dev_pm_ops)
 400
 401 #else
 402
 403 #define IWL_PM_OPS      NULL
 404
 405 #endif
 406
 407 static struct pci_driver iwl_pci_driver = {
 408         .name = DRV_NAME,
 409         .id_table = iwl_hw_card_ids,
 410         .probe = iwl_pci_probe,
 411         .remove = __devexit_p(iwl_pci_remove),
 412         .driver.pm = IWL_PM_OPS,
 413 };
 414
 415 int __must_check iwl_pci_register_driver(void)
 416 {
 417         int ret;
 418         ret = pci_register_driver(&iwl_pci_driver);
 419         if (ret)
 420                 pr_err("Unable to initialize PCI module\n");
 421
 422         return ret;
 423 }
 424
 425 void iwl_pci_unregister_driver(void)
 426 {
 427         pci_unregister_driver(&iwl_pci_driver);
 428 }