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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / char / agp / sis-agp.c
blob08704ae539566fa8c337b9dbaa34c31654ff0a8c
1 /*
2 * SiS AGPGART routines.
3 */
4
5 #include <linux/module.h>
6 #include <linux/pci.h>
7 #include <linux/init.h>
8 #include <linux/agp_backend.h>
9 #include <linux/delay.h>
10 #include "agp.h"
11
12 #define SIS_ATTBASE 0x90
13 #define SIS_APSIZE 0x94
14 #define SIS_TLBCNTRL 0x97
15 #define SIS_TLBFLUSH 0x98
16
17 #define PCI_DEVICE_ID_SI_662 0x0662
18 #define PCI_DEVICE_ID_SI_671 0x0671
19
20 static bool __devinitdata agp_sis_force_delay = 0;
21 static int __devinitdata agp_sis_agp_spec = -1;
22
23 static int sis_fetch_size(void)
24 {
25 u8 temp_size;
26 int i;
27 struct aper_size_info_8 *values;
28
29 pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
30 values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
31 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
32 if ((temp_size == values[i].size_value) ||
33 ((temp_size & ~(0x07)) ==
34 (values[i].size_value & ~(0x07)))) {
35 agp_bridge->previous_size =
36 agp_bridge->current_size = (void *) (values + i);
37
38 agp_bridge->aperture_size_idx = i;
39 return values[i].size;
40 }
41 }
42
43 return 0;
44 }
45
46 static void sis_tlbflush(struct agp_memory *mem)
47 {
48 pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
49 }
50
51 static int sis_configure(void)
52 {
53 u32 temp;
54 struct aper_size_info_8 *current_size;
55
56 current_size = A_SIZE_8(agp_bridge->current_size);
57 pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
58 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
59 agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
60 pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
61 agp_bridge->gatt_bus_addr);
62 pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
63 current_size->size_value);
64 return 0;
65 }
66
67 static void sis_cleanup(void)
68 {
69 struct aper_size_info_8 *previous_size;
70
71 previous_size = A_SIZE_8(agp_bridge->previous_size);
72 pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
73 (previous_size->size_value & ~(0x03)));
74 }
75
76 static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
77 {
78 struct pci_dev *device = NULL;
79 u32 command;
80 int rate;
81
82 dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n",
83 agp_bridge->major_version, agp_bridge->minor_version);
84
85 pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
86 command = agp_collect_device_status(bridge, mode, command);
87 command |= AGPSTAT_AGP_ENABLE;
88 rate = (command & 0x7) << 2;
89
90 for_each_pci_dev(device) {
91 u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
92 if (!agp)
93 continue;
94
95 dev_info(&agp_bridge->dev->dev, "putting AGP V3 device at %s into %dx mode\n",
96 pci_name(device), rate);
97
98 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
99
100 /*
101 * Weird: on some sis chipsets any rate change in the target
102 * command register triggers a 5ms screwup during which the master
103 * cannot be configured
104 */
105 if (device->device == bridge->dev->device) {
106 dev_info(&agp_bridge->dev->dev, "SiS delay workaround: giving bridge time to recover\n");
107 msleep(10);
108 }
109 }
110 }
111
112 static const struct aper_size_info_8 sis_generic_sizes[7] =
113 {
114 {256, 65536, 6, 99},
115 {128, 32768, 5, 83},
116 {64, 16384, 4, 67},
117 {32, 8192, 3, 51},
118 {16, 4096, 2, 35},
119 {8, 2048, 1, 19},
120 {4, 1024, 0, 3}
121 };
122
123 static struct agp_bridge_driver sis_driver = {
124 .owner = THIS_MODULE,
125 .aperture_sizes = sis_generic_sizes,
126 .size_type = U8_APER_SIZE,
127 .num_aperture_sizes = 7,
128 .needs_scratch_page = true,
129 .configure = sis_configure,
130 .fetch_size = sis_fetch_size,
131 .cleanup = sis_cleanup,
132 .tlb_flush = sis_tlbflush,
133 .mask_memory = agp_generic_mask_memory,
134 .masks = NULL,
135 .agp_enable = agp_generic_enable,
136 .cache_flush = global_cache_flush,
137 .create_gatt_table = agp_generic_create_gatt_table,
138 .free_gatt_table = agp_generic_free_gatt_table,
139 .insert_memory = agp_generic_insert_memory,
140 .remove_memory = agp_generic_remove_memory,
141 .alloc_by_type = agp_generic_alloc_by_type,
142 .free_by_type = agp_generic_free_by_type,
143 .agp_alloc_page = agp_generic_alloc_page,
144 .agp_alloc_pages = agp_generic_alloc_pages,
145 .agp_destroy_page = agp_generic_destroy_page,
146 .agp_destroy_pages = agp_generic_destroy_pages,
147 .agp_type_to_mask_type = agp_generic_type_to_mask_type,
148 };
149
150 // chipsets that require the 'delay hack'
151 static int sis_broken_chipsets[] __devinitdata = {
152 PCI_DEVICE_ID_SI_648,
153 PCI_DEVICE_ID_SI_746,
154 0 // terminator
155 };
156
157 static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
158 {
159 int i;
160
161 for (i=0; sis_broken_chipsets[i]!=0; ++i)
162 if (bridge->dev->device==sis_broken_chipsets[i])
163 break;
164
165 if (sis_broken_chipsets[i] || agp_sis_force_delay)
166 sis_driver.agp_enable=sis_delayed_enable;
167
168 // sis chipsets that indicate less than agp3.5
169 // are not actually fully agp3 compliant
170 if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
171 && agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
172 sis_driver.aperture_sizes = agp3_generic_sizes;
173 sis_driver.size_type = U16_APER_SIZE;
174 sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
175 sis_driver.configure = agp3_generic_configure;
176 sis_driver.fetch_size = agp3_generic_fetch_size;
177 sis_driver.cleanup = agp3_generic_cleanup;
178 sis_driver.tlb_flush = agp3_generic_tlbflush;
179 }
180 }
181
182
183 static int __devinit agp_sis_probe(struct pci_dev *pdev,
184 const struct pci_device_id *ent)
185 {
186 struct agp_bridge_data *bridge;
187 u8 cap_ptr;
188
189 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
190 if (!cap_ptr)
191 return -ENODEV;
192
193
194 dev_info(&pdev->dev, "SiS chipset [%04x/%04x]\n",
195 pdev->vendor, pdev->device);
196 bridge = agp_alloc_bridge();
197 if (!bridge)
198 return -ENOMEM;
199
200 bridge->driver = &sis_driver;
201 bridge->dev = pdev;
202 bridge->capndx = cap_ptr;
203
204 get_agp_version(bridge);
205
206 /* Fill in the mode register */
207 pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
208 sis_get_driver(bridge);
209
210 pci_set_drvdata(pdev, bridge);
211 return agp_add_bridge(bridge);
212 }
213
214 static void __devexit agp_sis_remove(struct pci_dev *pdev)
215 {
216 struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
217
218 agp_remove_bridge(bridge);
219 agp_put_bridge(bridge);
220 }
221
222 #ifdef CONFIG_PM
223
224 static int agp_sis_suspend(struct pci_dev *pdev, pm_message_t state)
225 {
226 pci_save_state(pdev);
227 pci_set_power_state(pdev, pci_choose_state(pdev, state));
228
229 return 0;
230 }
231
232 static int agp_sis_resume(struct pci_dev *pdev)
233 {
234 pci_set_power_state(pdev, PCI_D0);
235 pci_restore_state(pdev);
236
237 return sis_driver.configure();
238 }
239
240 #endif /* CONFIG_PM */
241
242 static struct pci_device_id agp_sis_pci_table[] = {
243 {
244 .class = (PCI_CLASS_BRIDGE_HOST << 8),
245 .class_mask = ~0,
246 .vendor = PCI_VENDOR_ID_SI,
247 .device = PCI_DEVICE_ID_SI_5591,
248 .subvendor = PCI_ANY_ID,
249 .subdevice = PCI_ANY_ID,
250 },
251 {
252 .class = (PCI_CLASS_BRIDGE_HOST << 8),
253 .class_mask = ~0,
254 .vendor = PCI_VENDOR_ID_SI,
255 .device = PCI_DEVICE_ID_SI_530,
256 .subvendor = PCI_ANY_ID,
257 .subdevice = PCI_ANY_ID,
258 },
259 {
260 .class = (PCI_CLASS_BRIDGE_HOST << 8),
261 .class_mask = ~0,
262 .vendor = PCI_VENDOR_ID_SI,
263 .device = PCI_DEVICE_ID_SI_540,
264 .subvendor = PCI_ANY_ID,
265 .subdevice = PCI_ANY_ID,
266 },
267 {
268 .class = (PCI_CLASS_BRIDGE_HOST << 8),
269 .class_mask = ~0,
270 .vendor = PCI_VENDOR_ID_SI,
271 .device = PCI_DEVICE_ID_SI_550,
272 .subvendor = PCI_ANY_ID,
273 .subdevice = PCI_ANY_ID,
274 },
275 {
276 .class = (PCI_CLASS_BRIDGE_HOST << 8),
277 .class_mask = ~0,
278 .vendor = PCI_VENDOR_ID_SI,
279 .device = PCI_DEVICE_ID_SI_620,
280 .subvendor = PCI_ANY_ID,
281 .subdevice = PCI_ANY_ID,
282 },
283 {
284 .class = (PCI_CLASS_BRIDGE_HOST << 8),
285 .class_mask = ~0,
286 .vendor = PCI_VENDOR_ID_SI,
287 .device = PCI_DEVICE_ID_SI_630,
288 .subvendor = PCI_ANY_ID,
289 .subdevice = PCI_ANY_ID,
290 },
291 {
292 .class = (PCI_CLASS_BRIDGE_HOST << 8),
293 .class_mask = ~0,
294 .vendor = PCI_VENDOR_ID_SI,
295 .device = PCI_DEVICE_ID_SI_635,
296 .subvendor = PCI_ANY_ID,
297 .subdevice = PCI_ANY_ID,
298 },
299 {
300 .class = (PCI_CLASS_BRIDGE_HOST << 8),
301 .class_mask = ~0,
302 .vendor = PCI_VENDOR_ID_SI,
303 .device = PCI_DEVICE_ID_SI_645,
304 .subvendor = PCI_ANY_ID,
305 .subdevice = PCI_ANY_ID,
306 },
307 {
308 .class = (PCI_CLASS_BRIDGE_HOST << 8),
309 .class_mask = ~0,
310 .vendor = PCI_VENDOR_ID_SI,
311 .device = PCI_DEVICE_ID_SI_646,
312 .subvendor = PCI_ANY_ID,
313 .subdevice = PCI_ANY_ID,
314 },
315 {
316 .class = (PCI_CLASS_BRIDGE_HOST << 8),
317 .class_mask = ~0,
318 .vendor = PCI_VENDOR_ID_SI,
319 .device = PCI_DEVICE_ID_SI_648,
320 .subvendor = PCI_ANY_ID,
321 .subdevice = PCI_ANY_ID,
322 },
323 {
324 .class = (PCI_CLASS_BRIDGE_HOST << 8),
325 .class_mask = ~0,
326 .vendor = PCI_VENDOR_ID_SI,
327 .device = PCI_DEVICE_ID_SI_650,
328 .subvendor = PCI_ANY_ID,
329 .subdevice = PCI_ANY_ID,
330 },
331 {
332 .class = (PCI_CLASS_BRIDGE_HOST << 8),
333 .class_mask = ~0,
334 .vendor = PCI_VENDOR_ID_SI,
335 .device = PCI_DEVICE_ID_SI_651,
336 .subvendor = PCI_ANY_ID,
337 .subdevice = PCI_ANY_ID,
338 },
339 {
340 .class = (PCI_CLASS_BRIDGE_HOST << 8),
341 .class_mask = ~0,
342 .vendor = PCI_VENDOR_ID_SI,
343 .device = PCI_DEVICE_ID_SI_655,
344 .subvendor = PCI_ANY_ID,
345 .subdevice = PCI_ANY_ID,
346 },
347 {
348 .class = (PCI_CLASS_BRIDGE_HOST << 8),
349 .class_mask = ~0,
350 .vendor = PCI_VENDOR_ID_SI,
351 .device = PCI_DEVICE_ID_SI_661,
352 .subvendor = PCI_ANY_ID,
353 .subdevice = PCI_ANY_ID,
354 },
355 {
356 .class = (PCI_CLASS_BRIDGE_HOST << 8),
357 .class_mask = ~0,
358 .vendor = PCI_VENDOR_ID_SI,
359 .device = PCI_DEVICE_ID_SI_662,
360 .subvendor = PCI_ANY_ID,
361 .subdevice = PCI_ANY_ID,
362 },
363 {
364 .class = (PCI_CLASS_BRIDGE_HOST << 8),
365 .class_mask = ~0,
366 .vendor = PCI_VENDOR_ID_SI,
367 .device = PCI_DEVICE_ID_SI_671,
368 .subvendor = PCI_ANY_ID,
369 .subdevice = PCI_ANY_ID,
370 },
371 {
372 .class = (PCI_CLASS_BRIDGE_HOST << 8),
373 .class_mask = ~0,
374 .vendor = PCI_VENDOR_ID_SI,
375 .device = PCI_DEVICE_ID_SI_730,
376 .subvendor = PCI_ANY_ID,
377 .subdevice = PCI_ANY_ID,
378 },
379 {
380 .class = (PCI_CLASS_BRIDGE_HOST << 8),
381 .class_mask = ~0,
382 .vendor = PCI_VENDOR_ID_SI,
383 .device = PCI_DEVICE_ID_SI_735,
384 .subvendor = PCI_ANY_ID,
385 .subdevice = PCI_ANY_ID,
386 },
387 {
388 .class = (PCI_CLASS_BRIDGE_HOST << 8),
389 .class_mask = ~0,
390 .vendor = PCI_VENDOR_ID_SI,
391 .device = PCI_DEVICE_ID_SI_740,
392 .subvendor = PCI_ANY_ID,
393 .subdevice = PCI_ANY_ID,
394 },
395 {
396 .class = (PCI_CLASS_BRIDGE_HOST << 8),
397 .class_mask = ~0,
398 .vendor = PCI_VENDOR_ID_SI,
399 .device = PCI_DEVICE_ID_SI_741,
400 .subvendor = PCI_ANY_ID,
401 .subdevice = PCI_ANY_ID,
402 },
403 {
404 .class = (PCI_CLASS_BRIDGE_HOST << 8),
405 .class_mask = ~0,
406 .vendor = PCI_VENDOR_ID_SI,
407 .device = PCI_DEVICE_ID_SI_745,
408 .subvendor = PCI_ANY_ID,
409 .subdevice = PCI_ANY_ID,
410 },
411 {
412 .class = (PCI_CLASS_BRIDGE_HOST << 8),
413 .class_mask = ~0,
414 .vendor = PCI_VENDOR_ID_SI,
415 .device = PCI_DEVICE_ID_SI_746,
416 .subvendor = PCI_ANY_ID,
417 .subdevice = PCI_ANY_ID,
418 },
419 { }
420 };
421
422 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
423
424 static struct pci_driver agp_sis_pci_driver = {
425 .name = "agpgart-sis",
426 .id_table = agp_sis_pci_table,
427 .probe = agp_sis_probe,
428 .remove = agp_sis_remove,
429 #ifdef CONFIG_PM
430 .suspend = agp_sis_suspend,
431 .resume = agp_sis_resume,
432 #endif
433 };
434
435 static int __init agp_sis_init(void)
436 {
437 if (agp_off)
438 return -EINVAL;
439 return pci_register_driver(&agp_sis_pci_driver);
440 }
441
442 static void __exit agp_sis_cleanup(void)
443 {
444 pci_unregister_driver(&agp_sis_pci_driver);
445 }
446
447 module_init(agp_sis_init);
448 module_exit(agp_sis_cleanup);
449
450 module_param(agp_sis_force_delay, bool, 0);
451 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
452 module_param(agp_sis_agp_spec, int, 0);
453 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
454 MODULE_LICENSE("GPL and additional rights");