Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[~shefty/rdma-dev.git] / drivers / net / wireless / iwlwifi / iwl-pci.c
1 /******************************************************************************
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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         /* pci hardware address support */
84         void __iomem *hw_base;
85 };
86
87 #define IWL_BUS_GET_PCI_BUS(_iwl_bus) \
88                         ((struct iwl_pci_bus *) ((_iwl_bus)->bus_specific))
89
90 #define IWL_BUS_GET_PCI_DEV(_iwl_bus) \
91                         ((IWL_BUS_GET_PCI_BUS(_iwl_bus))->pci_dev)
92
93 static u16 iwl_pciexp_link_ctrl(struct iwl_bus *bus)
94 {
95         int pos;
96         u16 pci_lnk_ctl;
97
98         struct pci_dev *pci_dev = IWL_BUS_GET_PCI_DEV(bus);
99
100         pos = pci_pcie_cap(pci_dev);
101         pci_read_config_word(pci_dev, pos + PCI_EXP_LNKCTL, &pci_lnk_ctl);
102         return pci_lnk_ctl;
103 }
104
105 static bool iwl_pci_is_pm_supported(struct iwl_bus *bus)
106 {
107         u16 lctl = iwl_pciexp_link_ctrl(bus);
108
109         return !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
110 }
111
112 static void iwl_pci_apm_config(struct iwl_bus *bus)
113 {
114         /*
115          * HW bug W/A for instability in PCIe bus L0S->L1 transition.
116          * Check if BIOS (or OS) enabled L1-ASPM on this device.
117          * If so (likely), disable L0S, so device moves directly L0->L1;
118          *    costs negligible amount of power savings.
119          * If not (unlikely), enable L0S, so there is at least some
120          *    power savings, even without L1.
121          */
122         u16 lctl = iwl_pciexp_link_ctrl(bus);
123
124         if ((lctl & PCI_CFG_LINK_CTRL_VAL_L1_EN) ==
125                                 PCI_CFG_LINK_CTRL_VAL_L1_EN) {
126                 /* L1-ASPM enabled; disable(!) L0S */
127                 iwl_set_bit(bus, CSR_GIO_REG,
128                                 CSR_GIO_REG_VAL_L0S_ENABLED);
129                 dev_printk(KERN_INFO, bus->dev, "L1 Enabled; Disabling L0S\n");
130         } else {
131                 /* L1-ASPM disabled; enable(!) L0S */
132                 iwl_clear_bit(bus, CSR_GIO_REG,
133                                 CSR_GIO_REG_VAL_L0S_ENABLED);
134                 dev_printk(KERN_INFO, bus->dev, "L1 Disabled; Enabling L0S\n");
135         }
136 }
137
138 static void iwl_pci_get_hw_id(struct iwl_bus *bus, char buf[],
139                               int buf_len)
140 {
141         struct pci_dev *pci_dev = IWL_BUS_GET_PCI_DEV(bus);
142
143         snprintf(buf, buf_len, "PCI ID: 0x%04X:0x%04X", pci_dev->device,
144                  pci_dev->subsystem_device);
145 }
146
147 static void iwl_pci_write8(struct iwl_bus *bus, u32 ofs, u8 val)
148 {
149         iowrite8(val, IWL_BUS_GET_PCI_BUS(bus)->hw_base + ofs);
150 }
151
152 static void iwl_pci_write32(struct iwl_bus *bus, u32 ofs, u32 val)
153 {
154         iowrite32(val, IWL_BUS_GET_PCI_BUS(bus)->hw_base + ofs);
155 }
156
157 static u32 iwl_pci_read32(struct iwl_bus *bus, u32 ofs)
158 {
159         u32 val = ioread32(IWL_BUS_GET_PCI_BUS(bus)->hw_base + ofs);
160         return val;
161 }
162
163 static const struct iwl_bus_ops bus_ops_pci = {
164         .get_pm_support = iwl_pci_is_pm_supported,
165         .apm_config = iwl_pci_apm_config,
166         .get_hw_id = iwl_pci_get_hw_id,
167         .write8 = iwl_pci_write8,
168         .write32 = iwl_pci_write32,
169         .read32 = iwl_pci_read32,
170 };
171
172 #define IWL_PCI_DEVICE(dev, subdev, cfg) \
173         .vendor = PCI_VENDOR_ID_INTEL,  .device = (dev), \
174         .subvendor = PCI_ANY_ID, .subdevice = (subdev), \
175         .driver_data = (kernel_ulong_t)&(cfg)
176
177 /* Hardware specific file defines the PCI IDs table for that hardware module */
178 static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
179         {IWL_PCI_DEVICE(0x4232, 0x1201, iwl5100_agn_cfg)}, /* Mini Card */
180         {IWL_PCI_DEVICE(0x4232, 0x1301, iwl5100_agn_cfg)}, /* Half Mini Card */
181         {IWL_PCI_DEVICE(0x4232, 0x1204, iwl5100_agn_cfg)}, /* Mini Card */
182         {IWL_PCI_DEVICE(0x4232, 0x1304, iwl5100_agn_cfg)}, /* Half Mini Card */
183         {IWL_PCI_DEVICE(0x4232, 0x1205, iwl5100_bgn_cfg)}, /* Mini Card */
184         {IWL_PCI_DEVICE(0x4232, 0x1305, iwl5100_bgn_cfg)}, /* Half Mini Card */
185         {IWL_PCI_DEVICE(0x4232, 0x1206, iwl5100_abg_cfg)}, /* Mini Card */
186         {IWL_PCI_DEVICE(0x4232, 0x1306, iwl5100_abg_cfg)}, /* Half Mini Card */
187         {IWL_PCI_DEVICE(0x4232, 0x1221, iwl5100_agn_cfg)}, /* Mini Card */
188         {IWL_PCI_DEVICE(0x4232, 0x1321, iwl5100_agn_cfg)}, /* Half Mini Card */
189         {IWL_PCI_DEVICE(0x4232, 0x1224, iwl5100_agn_cfg)}, /* Mini Card */
190         {IWL_PCI_DEVICE(0x4232, 0x1324, iwl5100_agn_cfg)}, /* Half Mini Card */
191         {IWL_PCI_DEVICE(0x4232, 0x1225, iwl5100_bgn_cfg)}, /* Mini Card */
192         {IWL_PCI_DEVICE(0x4232, 0x1325, iwl5100_bgn_cfg)}, /* Half Mini Card */
193         {IWL_PCI_DEVICE(0x4232, 0x1226, iwl5100_abg_cfg)}, /* Mini Card */
194         {IWL_PCI_DEVICE(0x4232, 0x1326, iwl5100_abg_cfg)}, /* Half Mini Card */
195         {IWL_PCI_DEVICE(0x4237, 0x1211, iwl5100_agn_cfg)}, /* Mini Card */
196         {IWL_PCI_DEVICE(0x4237, 0x1311, iwl5100_agn_cfg)}, /* Half Mini Card */
197         {IWL_PCI_DEVICE(0x4237, 0x1214, iwl5100_agn_cfg)}, /* Mini Card */
198         {IWL_PCI_DEVICE(0x4237, 0x1314, iwl5100_agn_cfg)}, /* Half Mini Card */
199         {IWL_PCI_DEVICE(0x4237, 0x1215, iwl5100_bgn_cfg)}, /* Mini Card */
200         {IWL_PCI_DEVICE(0x4237, 0x1315, iwl5100_bgn_cfg)}, /* Half Mini Card */
201         {IWL_PCI_DEVICE(0x4237, 0x1216, iwl5100_abg_cfg)}, /* Mini Card */
202         {IWL_PCI_DEVICE(0x4237, 0x1316, iwl5100_abg_cfg)}, /* Half Mini Card */
203
204 /* 5300 Series WiFi */
205         {IWL_PCI_DEVICE(0x4235, 0x1021, iwl5300_agn_cfg)}, /* Mini Card */
206         {IWL_PCI_DEVICE(0x4235, 0x1121, iwl5300_agn_cfg)}, /* Half Mini Card */
207         {IWL_PCI_DEVICE(0x4235, 0x1024, iwl5300_agn_cfg)}, /* Mini Card */
208         {IWL_PCI_DEVICE(0x4235, 0x1124, iwl5300_agn_cfg)}, /* Half Mini Card */
209         {IWL_PCI_DEVICE(0x4235, 0x1001, iwl5300_agn_cfg)}, /* Mini Card */
210         {IWL_PCI_DEVICE(0x4235, 0x1101, iwl5300_agn_cfg)}, /* Half Mini Card */
211         {IWL_PCI_DEVICE(0x4235, 0x1004, iwl5300_agn_cfg)}, /* Mini Card */
212         {IWL_PCI_DEVICE(0x4235, 0x1104, iwl5300_agn_cfg)}, /* Half Mini Card */
213         {IWL_PCI_DEVICE(0x4236, 0x1011, iwl5300_agn_cfg)}, /* Mini Card */
214         {IWL_PCI_DEVICE(0x4236, 0x1111, iwl5300_agn_cfg)}, /* Half Mini Card */
215         {IWL_PCI_DEVICE(0x4236, 0x1014, iwl5300_agn_cfg)}, /* Mini Card */
216         {IWL_PCI_DEVICE(0x4236, 0x1114, iwl5300_agn_cfg)}, /* Half Mini Card */
217
218 /* 5350 Series WiFi/WiMax */
219         {IWL_PCI_DEVICE(0x423A, 0x1001, iwl5350_agn_cfg)}, /* Mini Card */
220         {IWL_PCI_DEVICE(0x423A, 0x1021, iwl5350_agn_cfg)}, /* Mini Card */
221         {IWL_PCI_DEVICE(0x423B, 0x1011, iwl5350_agn_cfg)}, /* Mini Card */
222
223 /* 5150 Series Wifi/WiMax */
224         {IWL_PCI_DEVICE(0x423C, 0x1201, iwl5150_agn_cfg)}, /* Mini Card */
225         {IWL_PCI_DEVICE(0x423C, 0x1301, iwl5150_agn_cfg)}, /* Half Mini Card */
226         {IWL_PCI_DEVICE(0x423C, 0x1206, iwl5150_abg_cfg)}, /* Mini Card */
227         {IWL_PCI_DEVICE(0x423C, 0x1306, iwl5150_abg_cfg)}, /* Half Mini Card */
228         {IWL_PCI_DEVICE(0x423C, 0x1221, iwl5150_agn_cfg)}, /* Mini Card */
229         {IWL_PCI_DEVICE(0x423C, 0x1321, iwl5150_agn_cfg)}, /* Half Mini Card */
230
231         {IWL_PCI_DEVICE(0x423D, 0x1211, iwl5150_agn_cfg)}, /* Mini Card */
232         {IWL_PCI_DEVICE(0x423D, 0x1311, iwl5150_agn_cfg)}, /* Half Mini Card */
233         {IWL_PCI_DEVICE(0x423D, 0x1216, iwl5150_abg_cfg)}, /* Mini Card */
234         {IWL_PCI_DEVICE(0x423D, 0x1316, iwl5150_abg_cfg)}, /* Half Mini Card */
235
236 /* 6x00 Series */
237         {IWL_PCI_DEVICE(0x422B, 0x1101, iwl6000_3agn_cfg)},
238         {IWL_PCI_DEVICE(0x422B, 0x1121, iwl6000_3agn_cfg)},
239         {IWL_PCI_DEVICE(0x422C, 0x1301, iwl6000i_2agn_cfg)},
240         {IWL_PCI_DEVICE(0x422C, 0x1306, iwl6000i_2abg_cfg)},
241         {IWL_PCI_DEVICE(0x422C, 0x1307, iwl6000i_2bg_cfg)},
242         {IWL_PCI_DEVICE(0x422C, 0x1321, iwl6000i_2agn_cfg)},
243         {IWL_PCI_DEVICE(0x422C, 0x1326, iwl6000i_2abg_cfg)},
244         {IWL_PCI_DEVICE(0x4238, 0x1111, iwl6000_3agn_cfg)},
245         {IWL_PCI_DEVICE(0x4239, 0x1311, iwl6000i_2agn_cfg)},
246         {IWL_PCI_DEVICE(0x4239, 0x1316, iwl6000i_2abg_cfg)},
247
248 /* 6x05 Series */
249         {IWL_PCI_DEVICE(0x0082, 0x1301, iwl6005_2agn_cfg)},
250         {IWL_PCI_DEVICE(0x0082, 0x1306, iwl6005_2abg_cfg)},
251         {IWL_PCI_DEVICE(0x0082, 0x1307, iwl6005_2bg_cfg)},
252         {IWL_PCI_DEVICE(0x0082, 0x1321, iwl6005_2agn_cfg)},
253         {IWL_PCI_DEVICE(0x0082, 0x1326, iwl6005_2abg_cfg)},
254         {IWL_PCI_DEVICE(0x0085, 0x1311, iwl6005_2agn_cfg)},
255         {IWL_PCI_DEVICE(0x0085, 0x1316, iwl6005_2abg_cfg)},
256         {IWL_PCI_DEVICE(0x0082, 0xC020, iwl6005_2agn_sff_cfg)},
257         {IWL_PCI_DEVICE(0x0085, 0xC220, iwl6005_2agn_sff_cfg)},
258         {IWL_PCI_DEVICE(0x0082, 0x1341, iwl6005_2agn_d_cfg)},
259
260 /* 6x30 Series */
261         {IWL_PCI_DEVICE(0x008A, 0x5305, iwl1030_bgn_cfg)},
262         {IWL_PCI_DEVICE(0x008A, 0x5307, iwl1030_bg_cfg)},
263         {IWL_PCI_DEVICE(0x008A, 0x5325, iwl1030_bgn_cfg)},
264         {IWL_PCI_DEVICE(0x008A, 0x5327, iwl1030_bg_cfg)},
265         {IWL_PCI_DEVICE(0x008B, 0x5315, iwl1030_bgn_cfg)},
266         {IWL_PCI_DEVICE(0x008B, 0x5317, iwl1030_bg_cfg)},
267         {IWL_PCI_DEVICE(0x0090, 0x5211, iwl6030_2agn_cfg)},
268         {IWL_PCI_DEVICE(0x0090, 0x5215, iwl6030_2bgn_cfg)},
269         {IWL_PCI_DEVICE(0x0090, 0x5216, iwl6030_2abg_cfg)},
270         {IWL_PCI_DEVICE(0x0091, 0x5201, iwl6030_2agn_cfg)},
271         {IWL_PCI_DEVICE(0x0091, 0x5205, iwl6030_2bgn_cfg)},
272         {IWL_PCI_DEVICE(0x0091, 0x5206, iwl6030_2abg_cfg)},
273         {IWL_PCI_DEVICE(0x0091, 0x5207, iwl6030_2bg_cfg)},
274         {IWL_PCI_DEVICE(0x0091, 0x5221, iwl6030_2agn_cfg)},
275         {IWL_PCI_DEVICE(0x0091, 0x5225, iwl6030_2bgn_cfg)},
276         {IWL_PCI_DEVICE(0x0091, 0x5226, iwl6030_2abg_cfg)},
277
278 /* 6x50 WiFi/WiMax Series */
279         {IWL_PCI_DEVICE(0x0087, 0x1301, iwl6050_2agn_cfg)},
280         {IWL_PCI_DEVICE(0x0087, 0x1306, iwl6050_2abg_cfg)},
281         {IWL_PCI_DEVICE(0x0087, 0x1321, iwl6050_2agn_cfg)},
282         {IWL_PCI_DEVICE(0x0087, 0x1326, iwl6050_2abg_cfg)},
283         {IWL_PCI_DEVICE(0x0089, 0x1311, iwl6050_2agn_cfg)},
284         {IWL_PCI_DEVICE(0x0089, 0x1316, iwl6050_2abg_cfg)},
285
286 /* 6150 WiFi/WiMax Series */
287         {IWL_PCI_DEVICE(0x0885, 0x1305, iwl6150_bgn_cfg)},
288         {IWL_PCI_DEVICE(0x0885, 0x1307, iwl6150_bg_cfg)},
289         {IWL_PCI_DEVICE(0x0885, 0x1325, iwl6150_bgn_cfg)},
290         {IWL_PCI_DEVICE(0x0885, 0x1327, iwl6150_bg_cfg)},
291         {IWL_PCI_DEVICE(0x0886, 0x1315, iwl6150_bgn_cfg)},
292         {IWL_PCI_DEVICE(0x0886, 0x1317, iwl6150_bg_cfg)},
293
294 /* 1000 Series WiFi */
295         {IWL_PCI_DEVICE(0x0083, 0x1205, iwl1000_bgn_cfg)},
296         {IWL_PCI_DEVICE(0x0083, 0x1305, iwl1000_bgn_cfg)},
297         {IWL_PCI_DEVICE(0x0083, 0x1225, iwl1000_bgn_cfg)},
298         {IWL_PCI_DEVICE(0x0083, 0x1325, iwl1000_bgn_cfg)},
299         {IWL_PCI_DEVICE(0x0084, 0x1215, iwl1000_bgn_cfg)},
300         {IWL_PCI_DEVICE(0x0084, 0x1315, iwl1000_bgn_cfg)},
301         {IWL_PCI_DEVICE(0x0083, 0x1206, iwl1000_bg_cfg)},
302         {IWL_PCI_DEVICE(0x0083, 0x1306, iwl1000_bg_cfg)},
303         {IWL_PCI_DEVICE(0x0083, 0x1226, iwl1000_bg_cfg)},
304         {IWL_PCI_DEVICE(0x0083, 0x1326, iwl1000_bg_cfg)},
305         {IWL_PCI_DEVICE(0x0084, 0x1216, iwl1000_bg_cfg)},
306         {IWL_PCI_DEVICE(0x0084, 0x1316, iwl1000_bg_cfg)},
307
308 /* 100 Series WiFi */
309         {IWL_PCI_DEVICE(0x08AE, 0x1005, iwl100_bgn_cfg)},
310         {IWL_PCI_DEVICE(0x08AE, 0x1007, iwl100_bg_cfg)},
311         {IWL_PCI_DEVICE(0x08AF, 0x1015, iwl100_bgn_cfg)},
312         {IWL_PCI_DEVICE(0x08AF, 0x1017, iwl100_bg_cfg)},
313         {IWL_PCI_DEVICE(0x08AE, 0x1025, iwl100_bgn_cfg)},
314         {IWL_PCI_DEVICE(0x08AE, 0x1027, iwl100_bg_cfg)},
315
316 /* 130 Series WiFi */
317         {IWL_PCI_DEVICE(0x0896, 0x5005, iwl130_bgn_cfg)},
318         {IWL_PCI_DEVICE(0x0896, 0x5007, iwl130_bg_cfg)},
319         {IWL_PCI_DEVICE(0x0897, 0x5015, iwl130_bgn_cfg)},
320         {IWL_PCI_DEVICE(0x0897, 0x5017, iwl130_bg_cfg)},
321         {IWL_PCI_DEVICE(0x0896, 0x5025, iwl130_bgn_cfg)},
322         {IWL_PCI_DEVICE(0x0896, 0x5027, iwl130_bg_cfg)},
323
324 /* 2x00 Series */
325         {IWL_PCI_DEVICE(0x0890, 0x4022, iwl2000_2bgn_cfg)},
326         {IWL_PCI_DEVICE(0x0891, 0x4222, iwl2000_2bgn_cfg)},
327         {IWL_PCI_DEVICE(0x0890, 0x4422, iwl2000_2bgn_cfg)},
328         {IWL_PCI_DEVICE(0x0890, 0x4026, iwl2000_2bg_cfg)},
329         {IWL_PCI_DEVICE(0x0891, 0x4226, iwl2000_2bg_cfg)},
330         {IWL_PCI_DEVICE(0x0890, 0x4426, iwl2000_2bg_cfg)},
331         {IWL_PCI_DEVICE(0x0890, 0x4822, iwl2000_2bgn_d_cfg)},
332
333 /* 2x30 Series */
334         {IWL_PCI_DEVICE(0x0887, 0x4062, iwl2030_2bgn_cfg)},
335         {IWL_PCI_DEVICE(0x0888, 0x4262, iwl2030_2bgn_cfg)},
336         {IWL_PCI_DEVICE(0x0887, 0x4462, iwl2030_2bgn_cfg)},
337         {IWL_PCI_DEVICE(0x0887, 0x4066, iwl2030_2bg_cfg)},
338         {IWL_PCI_DEVICE(0x0888, 0x4266, iwl2030_2bg_cfg)},
339         {IWL_PCI_DEVICE(0x0887, 0x4466, iwl2030_2bg_cfg)},
340
341 /* 6x35 Series */
342         {IWL_PCI_DEVICE(0x088E, 0x4060, iwl6035_2agn_cfg)},
343         {IWL_PCI_DEVICE(0x088F, 0x4260, iwl6035_2agn_cfg)},
344         {IWL_PCI_DEVICE(0x088E, 0x4460, iwl6035_2agn_cfg)},
345         {IWL_PCI_DEVICE(0x088E, 0x4064, iwl6035_2abg_cfg)},
346         {IWL_PCI_DEVICE(0x088F, 0x4264, iwl6035_2abg_cfg)},
347         {IWL_PCI_DEVICE(0x088E, 0x4464, iwl6035_2abg_cfg)},
348         {IWL_PCI_DEVICE(0x088E, 0x4066, iwl6035_2bg_cfg)},
349         {IWL_PCI_DEVICE(0x088F, 0x4266, iwl6035_2bg_cfg)},
350         {IWL_PCI_DEVICE(0x088E, 0x4466, iwl6035_2bg_cfg)},
351
352 /* 105 Series */
353         {IWL_PCI_DEVICE(0x0894, 0x0022, iwl105_bgn_cfg)},
354         {IWL_PCI_DEVICE(0x0895, 0x0222, iwl105_bgn_cfg)},
355         {IWL_PCI_DEVICE(0x0894, 0x0422, iwl105_bgn_cfg)},
356         {IWL_PCI_DEVICE(0x0894, 0x0026, iwl105_bg_cfg)},
357         {IWL_PCI_DEVICE(0x0895, 0x0226, iwl105_bg_cfg)},
358         {IWL_PCI_DEVICE(0x0894, 0x0426, iwl105_bg_cfg)},
359         {IWL_PCI_DEVICE(0x0894, 0x0822, iwl105_bgn_d_cfg)},
360
361 /* 135 Series */
362         {IWL_PCI_DEVICE(0x0892, 0x0062, iwl135_bgn_cfg)},
363         {IWL_PCI_DEVICE(0x0893, 0x0262, iwl135_bgn_cfg)},
364         {IWL_PCI_DEVICE(0x0892, 0x0462, iwl135_bgn_cfg)},
365         {IWL_PCI_DEVICE(0x0892, 0x0066, iwl135_bg_cfg)},
366         {IWL_PCI_DEVICE(0x0893, 0x0266, iwl135_bg_cfg)},
367         {IWL_PCI_DEVICE(0x0892, 0x0466, iwl135_bg_cfg)},
368
369         {0}
370 };
371 MODULE_DEVICE_TABLE(pci, iwl_hw_card_ids);
372
373 static int iwl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
374 {
375         struct iwl_cfg *cfg = (struct iwl_cfg *)(ent->driver_data);
376         struct iwl_bus *bus;
377         struct iwl_pci_bus *pci_bus;
378         u16 pci_cmd;
379         int err;
380
381         bus = kzalloc(sizeof(*bus) + sizeof(*pci_bus), GFP_KERNEL);
382         if (!bus) {
383                 dev_printk(KERN_ERR, &pdev->dev,
384                            "Couldn't allocate iwl_pci_bus");
385                 err = -ENOMEM;
386                 goto out_no_pci;
387         }
388
389         pci_bus = IWL_BUS_GET_PCI_BUS(bus);
390         pci_bus->pci_dev = pdev;
391
392         pci_set_drvdata(pdev, bus);
393
394         /* W/A - seems to solve weird behavior. We need to remove this if we
395          * don't want to stay in L1 all the time. This wastes a lot of power */
396         pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1 |
397                                 PCIE_LINK_STATE_CLKPM);
398
399         if (pci_enable_device(pdev)) {
400                 err = -ENODEV;
401                 goto out_no_pci;
402         }
403
404         pci_set_master(pdev);
405
406         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36));
407         if (!err)
408                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(36));
409         if (err) {
410                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
411                 if (!err)
412                         err = pci_set_consistent_dma_mask(pdev,
413                                                         DMA_BIT_MASK(32));
414                 /* both attempts failed: */
415                 if (err) {
416                         dev_printk(KERN_ERR, bus->dev,
417                                    "No suitable DMA available.\n");
418                         goto out_pci_disable_device;
419                 }
420         }
421
422         err = pci_request_regions(pdev, DRV_NAME);
423         if (err) {
424                 dev_printk(KERN_ERR, bus->dev, "pci_request_regions failed");
425                 goto out_pci_disable_device;
426         }
427
428         pci_bus->hw_base = pci_iomap(pdev, 0, 0);
429         if (!pci_bus->hw_base) {
430                 dev_printk(KERN_ERR, bus->dev, "pci_iomap failed");
431                 err = -ENODEV;
432                 goto out_pci_release_regions;
433         }
434
435         dev_printk(KERN_INFO, &pdev->dev,
436                 "pci_resource_len = 0x%08llx\n",
437                 (unsigned long long) pci_resource_len(pdev, 0));
438         dev_printk(KERN_INFO, &pdev->dev,
439                 "pci_resource_base = %p\n", pci_bus->hw_base);
440
441         dev_printk(KERN_INFO, &pdev->dev,
442                 "HW Revision ID = 0x%X\n", pdev->revision);
443
444         /* We disable the RETRY_TIMEOUT register (0x41) to keep
445          * PCI Tx retries from interfering with C3 CPU state */
446         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
447
448         err = pci_enable_msi(pdev);
449         if (err)
450                 dev_printk(KERN_ERR, &pdev->dev,
451                         "pci_enable_msi failed(0X%x)", err);
452
453         /* TODO: Move this away, not needed if not MSI */
454         /* enable rfkill interrupt: hw bug w/a */
455         pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
456         if (pci_cmd & PCI_COMMAND_INTX_DISABLE) {
457                 pci_cmd &= ~PCI_COMMAND_INTX_DISABLE;
458                 pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
459         }
460
461         bus->dev = &pdev->dev;
462         bus->irq = pdev->irq;
463         bus->ops = &bus_ops_pci;
464
465         err = iwl_probe(bus, &trans_ops_pcie, cfg);
466         if (err)
467                 goto out_disable_msi;
468         return 0;
469
470 out_disable_msi:
471         pci_disable_msi(pdev);
472         pci_iounmap(pdev, pci_bus->hw_base);
473 out_pci_release_regions:
474         pci_set_drvdata(pdev, NULL);
475         pci_release_regions(pdev);
476 out_pci_disable_device:
477         pci_disable_device(pdev);
478 out_no_pci:
479         kfree(bus);
480         return err;
481 }
482
483 static void __devexit iwl_pci_remove(struct pci_dev *pdev)
484 {
485         struct iwl_bus *bus = pci_get_drvdata(pdev);
486         struct iwl_pci_bus *pci_bus = IWL_BUS_GET_PCI_BUS(bus);
487         struct pci_dev *pci_dev = IWL_BUS_GET_PCI_DEV(bus);
488         struct iwl_shared *shrd = bus->shrd;
489
490         iwl_remove(shrd->priv);
491
492         pci_disable_msi(pci_dev);
493         pci_iounmap(pci_dev, pci_bus->hw_base);
494         pci_release_regions(pci_dev);
495         pci_disable_device(pci_dev);
496         pci_set_drvdata(pci_dev, NULL);
497
498         kfree(bus);
499 }
500
501 #ifdef CONFIG_PM_SLEEP
502
503 static int iwl_pci_suspend(struct device *device)
504 {
505         struct pci_dev *pdev = to_pci_dev(device);
506         struct iwl_bus *bus = pci_get_drvdata(pdev);
507         struct iwl_shared *shrd = bus->shrd;
508
509         /* Before you put code here, think about WoWLAN. You cannot check here
510          * whether WoWLAN is enabled or not, and your code will run even if
511          * WoWLAN is enabled - don't kill the NIC, someone may need it in Sx.
512          */
513
514         return iwl_trans_suspend(shrd->trans);
515 }
516
517 static int iwl_pci_resume(struct device *device)
518 {
519         struct pci_dev *pdev = to_pci_dev(device);
520         struct iwl_bus *bus = pci_get_drvdata(pdev);
521         struct iwl_shared *shrd = bus->shrd;
522
523         /* Before you put code here, think about WoWLAN. You cannot check here
524          * whether WoWLAN is enabled or not, and your code will run even if
525          * WoWLAN is enabled - the NIC may be alive.
526          */
527
528         /*
529          * We disable the RETRY_TIMEOUT register (0x41) to keep
530          * PCI Tx retries from interfering with C3 CPU state.
531          */
532         pci_write_config_byte(pdev, PCI_CFG_RETRY_TIMEOUT, 0x00);
533
534         return iwl_trans_resume(shrd->trans);
535 }
536
537 static SIMPLE_DEV_PM_OPS(iwl_dev_pm_ops, iwl_pci_suspend, iwl_pci_resume);
538
539 #define IWL_PM_OPS      (&iwl_dev_pm_ops)
540
541 #else
542
543 #define IWL_PM_OPS      NULL
544
545 #endif
546
547 static struct pci_driver iwl_pci_driver = {
548         .name = DRV_NAME,
549         .id_table = iwl_hw_card_ids,
550         .probe = iwl_pci_probe,
551         .remove = __devexit_p(iwl_pci_remove),
552         .driver.pm = IWL_PM_OPS,
553 };
554
555 int __must_check iwl_pci_register_driver(void)
556 {
557         int ret;
558         ret = pci_register_driver(&iwl_pci_driver);
559         if (ret)
560                 pr_err("Unable to initialize PCI module\n");
561
562         return ret;
563 }
564
565 void iwl_pci_unregister_driver(void)
566 {
567         pci_unregister_driver(&iwl_pci_driver);
568 }