xref: /openbmc/linux/drivers/char/agp/sis-agp.c (revision 746e926b)
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 
agp_sis_resume(struct device * dev)220 static int agp_sis_resume(__attribute__((unused)) struct device *dev)
221 {
222 	return sis_driver.configure();
223 }
224 
225 static const struct pci_device_id agp_sis_pci_table[] = {
226 	{
227 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
228 		.class_mask	= ~0,
229 		.vendor		= PCI_VENDOR_ID_SI,
230 		.device		= PCI_DEVICE_ID_SI_5591,
231 		.subvendor	= PCI_ANY_ID,
232 		.subdevice	= PCI_ANY_ID,
233 	},
234 	{
235 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
236 		.class_mask	= ~0,
237 		.vendor		= PCI_VENDOR_ID_SI,
238 		.device		= PCI_DEVICE_ID_SI_530,
239 		.subvendor	= PCI_ANY_ID,
240 		.subdevice	= PCI_ANY_ID,
241 	},
242 	{
243 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
244 		.class_mask	= ~0,
245 		.vendor		= PCI_VENDOR_ID_SI,
246 		.device		= PCI_DEVICE_ID_SI_540,
247 		.subvendor	= PCI_ANY_ID,
248 		.subdevice	= PCI_ANY_ID,
249 	},
250 	{
251 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
252 		.class_mask	= ~0,
253 		.vendor		= PCI_VENDOR_ID_SI,
254 		.device		= PCI_DEVICE_ID_SI_550,
255 		.subvendor	= PCI_ANY_ID,
256 		.subdevice	= PCI_ANY_ID,
257 	},
258 	{
259 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
260 		.class_mask	= ~0,
261 		.vendor		= PCI_VENDOR_ID_SI,
262 		.device		= PCI_DEVICE_ID_SI_620,
263 		.subvendor	= PCI_ANY_ID,
264 		.subdevice	= PCI_ANY_ID,
265 	},
266 	{
267 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
268 		.class_mask	= ~0,
269 		.vendor		= PCI_VENDOR_ID_SI,
270 		.device		= PCI_DEVICE_ID_SI_630,
271 		.subvendor	= PCI_ANY_ID,
272 		.subdevice	= PCI_ANY_ID,
273 	},
274 	{
275 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
276 		.class_mask	= ~0,
277 		.vendor		= PCI_VENDOR_ID_SI,
278 		.device		= PCI_DEVICE_ID_SI_635,
279 		.subvendor	= PCI_ANY_ID,
280 		.subdevice	= PCI_ANY_ID,
281 	},
282 	{
283 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
284 		.class_mask	= ~0,
285 		.vendor		= PCI_VENDOR_ID_SI,
286 		.device		= PCI_DEVICE_ID_SI_645,
287 		.subvendor	= PCI_ANY_ID,
288 		.subdevice	= PCI_ANY_ID,
289 	},
290 	{
291 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
292 		.class_mask	= ~0,
293 		.vendor		= PCI_VENDOR_ID_SI,
294 		.device		= PCI_DEVICE_ID_SI_646,
295 		.subvendor	= PCI_ANY_ID,
296 		.subdevice	= PCI_ANY_ID,
297 	},
298 	{
299 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
300 		.class_mask	= ~0,
301 		.vendor		= PCI_VENDOR_ID_SI,
302 		.device		= PCI_DEVICE_ID_SI_648,
303 		.subvendor	= PCI_ANY_ID,
304 		.subdevice	= PCI_ANY_ID,
305 	},
306 	{
307 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
308 		.class_mask	= ~0,
309 		.vendor		= PCI_VENDOR_ID_SI,
310 		.device		= PCI_DEVICE_ID_SI_650,
311 		.subvendor	= PCI_ANY_ID,
312 		.subdevice	= PCI_ANY_ID,
313 	},
314 	{
315 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
316 		.class_mask	= ~0,
317 		.vendor		= PCI_VENDOR_ID_SI,
318 		.device		= PCI_DEVICE_ID_SI_651,
319 		.subvendor	= PCI_ANY_ID,
320 		.subdevice	= PCI_ANY_ID,
321 	},
322 	{
323 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
324 		.class_mask	= ~0,
325 		.vendor		= PCI_VENDOR_ID_SI,
326 		.device		= PCI_DEVICE_ID_SI_655,
327 		.subvendor	= PCI_ANY_ID,
328 		.subdevice	= PCI_ANY_ID,
329 	},
330 	{
331 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
332 		.class_mask	= ~0,
333 		.vendor		= PCI_VENDOR_ID_SI,
334 		.device		= PCI_DEVICE_ID_SI_661,
335 		.subvendor	= PCI_ANY_ID,
336 		.subdevice	= PCI_ANY_ID,
337 	},
338 	{
339 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
340 		.class_mask	= ~0,
341 		.vendor		= PCI_VENDOR_ID_SI,
342 		.device		= PCI_DEVICE_ID_SI_662,
343 		.subvendor	= PCI_ANY_ID,
344 		.subdevice	= PCI_ANY_ID,
345 	},
346 	{
347 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
348 		.class_mask	= ~0,
349 		.vendor		= PCI_VENDOR_ID_SI,
350 		.device		= PCI_DEVICE_ID_SI_671,
351 		.subvendor	= PCI_ANY_ID,
352 		.subdevice	= PCI_ANY_ID,
353 	},
354 	{
355 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
356 		.class_mask	= ~0,
357 		.vendor		= PCI_VENDOR_ID_SI,
358 		.device		= PCI_DEVICE_ID_SI_730,
359 		.subvendor	= PCI_ANY_ID,
360 		.subdevice	= PCI_ANY_ID,
361 	},
362 	{
363 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
364 		.class_mask	= ~0,
365 		.vendor		= PCI_VENDOR_ID_SI,
366 		.device		= PCI_DEVICE_ID_SI_735,
367 		.subvendor	= PCI_ANY_ID,
368 		.subdevice	= PCI_ANY_ID,
369 	},
370 	{
371 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
372 		.class_mask	= ~0,
373 		.vendor		= PCI_VENDOR_ID_SI,
374 		.device		= PCI_DEVICE_ID_SI_740,
375 		.subvendor	= PCI_ANY_ID,
376 		.subdevice	= PCI_ANY_ID,
377 	},
378 	{
379 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
380 		.class_mask	= ~0,
381 		.vendor		= PCI_VENDOR_ID_SI,
382 		.device		= PCI_DEVICE_ID_SI_741,
383 		.subvendor	= PCI_ANY_ID,
384 		.subdevice	= PCI_ANY_ID,
385 	},
386 	{
387 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
388 		.class_mask	= ~0,
389 		.vendor		= PCI_VENDOR_ID_SI,
390 		.device		= PCI_DEVICE_ID_SI_745,
391 		.subvendor	= PCI_ANY_ID,
392 		.subdevice	= PCI_ANY_ID,
393 	},
394 	{
395 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
396 		.class_mask	= ~0,
397 		.vendor		= PCI_VENDOR_ID_SI,
398 		.device		= PCI_DEVICE_ID_SI_746,
399 		.subvendor	= PCI_ANY_ID,
400 		.subdevice	= PCI_ANY_ID,
401 	},
402 	{ }
403 };
404 
405 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
406 
407 static DEFINE_SIMPLE_DEV_PM_OPS(agp_sis_pm_ops, NULL, agp_sis_resume);
408 
409 static struct pci_driver agp_sis_pci_driver = {
410 	.name		= "agpgart-sis",
411 	.id_table	= agp_sis_pci_table,
412 	.probe		= agp_sis_probe,
413 	.remove		= agp_sis_remove,
414 	.driver.pm      = &agp_sis_pm_ops,
415 };
416 
agp_sis_init(void)417 static int __init agp_sis_init(void)
418 {
419 	if (agp_off)
420 		return -EINVAL;
421 	return pci_register_driver(&agp_sis_pci_driver);
422 }
423 
agp_sis_cleanup(void)424 static void __exit agp_sis_cleanup(void)
425 {
426 	pci_unregister_driver(&agp_sis_pci_driver);
427 }
428 
429 module_init(agp_sis_init);
430 module_exit(agp_sis_cleanup);
431 
432 module_param(agp_sis_force_delay, bool, 0);
433 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
434 module_param(agp_sis_agp_spec, int, 0);
435 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
436 MODULE_LICENSE("GPL and additional rights");
437