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