xref: /linux/drivers/char/agp/ali-agp.c (revision a1ff5a7d78a036d6c2178ee5acd6ba4946243800)
1 /*
2  * ALi AGPGART routines.
3  */
4 
5 #include <linux/types.h>
6 #include <linux/module.h>
7 #include <linux/pci.h>
8 #include <linux/init.h>
9 #include <linux/agp_backend.h>
10 #include <asm/page.h>		/* PAGE_SIZE */
11 #include "agp.h"
12 
13 #define ALI_AGPCTRL	0xb8
14 #define ALI_ATTBASE	0xbc
15 #define ALI_TLBCTRL	0xc0
16 #define ALI_TAGCTRL	0xc4
17 #define ALI_CACHE_FLUSH_CTRL	0xD0
18 #define ALI_CACHE_FLUSH_ADDR_MASK	0xFFFFF000
19 #define ALI_CACHE_FLUSH_EN	0x100
20 
ali_fetch_size(void)21 static int ali_fetch_size(void)
22 {
23 	int i;
24 	u32 temp;
25 	struct aper_size_info_32 *values;
26 
27 	pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
28 	temp &= ~(0xfffffff0);
29 	values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
30 
31 	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
32 		if (temp == values[i].size_value) {
33 			agp_bridge->previous_size =
34 			    agp_bridge->current_size = (void *) (values + i);
35 			agp_bridge->aperture_size_idx = i;
36 			return values[i].size;
37 		}
38 	}
39 
40 	return 0;
41 }
42 
ali_tlbflush(struct agp_memory * mem)43 static void ali_tlbflush(struct agp_memory *mem)
44 {
45 	u32 temp;
46 
47 	pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
48 	temp &= 0xfffffff0;
49 	temp |= (1<<0 | 1<<1);
50 	pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL, temp);
51 }
52 
ali_cleanup(void)53 static void ali_cleanup(void)
54 {
55 	struct aper_size_info_32 *previous_size;
56 	u32 temp;
57 
58 	previous_size = A_SIZE_32(agp_bridge->previous_size);
59 
60 	pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
61 // clear tag
62 	pci_write_config_dword(agp_bridge->dev, ALI_TAGCTRL,
63 			((temp & 0xffffff00) | 0x00000001|0x00000002));
64 
65 	pci_read_config_dword(agp_bridge->dev,  ALI_ATTBASE, &temp);
66 	pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE,
67 			((temp & 0x00000ff0) | previous_size->size_value));
68 }
69 
ali_configure(void)70 static int ali_configure(void)
71 {
72 	u32 temp;
73 	struct aper_size_info_32 *current_size;
74 
75 	current_size = A_SIZE_32(agp_bridge->current_size);
76 
77 	/* aperture size and gatt addr */
78 	pci_read_config_dword(agp_bridge->dev, ALI_ATTBASE, &temp);
79 	temp = (((temp & 0x00000ff0) | (agp_bridge->gatt_bus_addr & 0xfffff000))
80 			| (current_size->size_value & 0xf));
81 	pci_write_config_dword(agp_bridge->dev, ALI_ATTBASE, temp);
82 
83 	/* tlb control */
84 	pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
85 	pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, ((temp & 0xffffff00) | 0x00000010));
86 
87 	/* address to map to */
88 	agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
89 						    AGP_APERTURE_BAR);
90 
91 #if 0
92 	if (agp_bridge->type == ALI_M1541) {
93 		u32 nlvm_addr = 0;
94 
95 		switch (current_size->size_value) {
96 			case 0:  break;
97 			case 1:  nlvm_addr = 0x100000;break;
98 			case 2:  nlvm_addr = 0x200000;break;
99 			case 3:  nlvm_addr = 0x400000;break;
100 			case 4:  nlvm_addr = 0x800000;break;
101 			case 6:  nlvm_addr = 0x1000000;break;
102 			case 7:  nlvm_addr = 0x2000000;break;
103 			case 8:  nlvm_addr = 0x4000000;break;
104 			case 9:  nlvm_addr = 0x8000000;break;
105 			case 10: nlvm_addr = 0x10000000;break;
106 			default: break;
107 		}
108 		nlvm_addr--;
109 		nlvm_addr&=0xfff00000;
110 
111 		nlvm_addr+= agp_bridge->gart_bus_addr;
112 		nlvm_addr|=(agp_bridge->gart_bus_addr>>12);
113 		dev_info(&agp_bridge->dev->dev, "nlvm top &base = %8x\n",
114 			 nlvm_addr);
115 	}
116 #endif
117 
118 	pci_read_config_dword(agp_bridge->dev, ALI_TLBCTRL, &temp);
119 	temp &= 0xffffff7f;		//enable TLB
120 	pci_write_config_dword(agp_bridge->dev, ALI_TLBCTRL, temp);
121 
122 	return 0;
123 }
124 
125 
m1541_cache_flush(void)126 static void m1541_cache_flush(void)
127 {
128 	int i, page_count;
129 	u32 temp;
130 
131 	global_cache_flush();
132 
133 	page_count = 1 << A_SIZE_32(agp_bridge->current_size)->page_order;
134 	for (i = 0; i < PAGE_SIZE * page_count; i += PAGE_SIZE) {
135 		pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
136 				&temp);
137 		pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
138 				(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
139 				  (agp_bridge->gatt_bus_addr + i)) |
140 				 ALI_CACHE_FLUSH_EN));
141 	}
142 }
143 
m1541_alloc_page(struct agp_bridge_data * bridge)144 static struct page *m1541_alloc_page(struct agp_bridge_data *bridge)
145 {
146 	struct page *page = agp_generic_alloc_page(agp_bridge);
147 	u32 temp;
148 
149 	if (!page)
150 		return NULL;
151 
152 	pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
153 	pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
154 			(((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
155 			  page_to_phys(page)) | ALI_CACHE_FLUSH_EN ));
156 	return page;
157 }
158 
ali_destroy_page(struct page * page,int flags)159 static void ali_destroy_page(struct page *page, int flags)
160 {
161 	if (page) {
162 		if (flags & AGP_PAGE_DESTROY_UNMAP) {
163 			global_cache_flush();	/* is this really needed?  --hch */
164 			agp_generic_destroy_page(page, flags);
165 		} else
166 			agp_generic_destroy_page(page, flags);
167 	}
168 }
169 
m1541_destroy_page(struct page * page,int flags)170 static void m1541_destroy_page(struct page *page, int flags)
171 {
172 	u32 temp;
173 
174 	if (page == NULL)
175 		return;
176 
177 	if (flags & AGP_PAGE_DESTROY_UNMAP) {
178 		global_cache_flush();
179 
180 		pci_read_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL, &temp);
181 		pci_write_config_dword(agp_bridge->dev, ALI_CACHE_FLUSH_CTRL,
182 				       (((temp & ALI_CACHE_FLUSH_ADDR_MASK) |
183 					 page_to_phys(page)) | ALI_CACHE_FLUSH_EN));
184 	}
185 	agp_generic_destroy_page(page, flags);
186 }
187 
188 
189 /* Setup function */
190 
191 static const struct aper_size_info_32 ali_generic_sizes[7] =
192 {
193 	{256, 65536, 6, 10},
194 	{128, 32768, 5, 9},
195 	{64, 16384, 4, 8},
196 	{32, 8192, 3, 7},
197 	{16, 4096, 2, 6},
198 	{8, 2048, 1, 4},
199 	{4, 1024, 0, 3}
200 };
201 
202 static const struct agp_bridge_driver ali_generic_bridge = {
203 	.owner			= THIS_MODULE,
204 	.aperture_sizes		= ali_generic_sizes,
205 	.size_type		= U32_APER_SIZE,
206 	.num_aperture_sizes	= 7,
207 	.needs_scratch_page	= true,
208 	.configure		= ali_configure,
209 	.fetch_size		= ali_fetch_size,
210 	.cleanup		= ali_cleanup,
211 	.tlb_flush		= ali_tlbflush,
212 	.mask_memory		= agp_generic_mask_memory,
213 	.masks			= NULL,
214 	.agp_enable		= agp_generic_enable,
215 	.cache_flush		= global_cache_flush,
216 	.create_gatt_table	= agp_generic_create_gatt_table,
217 	.free_gatt_table	= agp_generic_free_gatt_table,
218 	.insert_memory		= agp_generic_insert_memory,
219 	.remove_memory		= agp_generic_remove_memory,
220 	.alloc_by_type		= agp_generic_alloc_by_type,
221 	.free_by_type		= agp_generic_free_by_type,
222 	.agp_alloc_page		= agp_generic_alloc_page,
223 	.agp_destroy_page	= ali_destroy_page,
224 	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
225 };
226 
227 static const struct agp_bridge_driver ali_m1541_bridge = {
228 	.owner			= THIS_MODULE,
229 	.aperture_sizes		= ali_generic_sizes,
230 	.size_type		= U32_APER_SIZE,
231 	.num_aperture_sizes	= 7,
232 	.configure		= ali_configure,
233 	.fetch_size		= ali_fetch_size,
234 	.cleanup		= ali_cleanup,
235 	.tlb_flush		= ali_tlbflush,
236 	.mask_memory		= agp_generic_mask_memory,
237 	.masks			= NULL,
238 	.agp_enable		= agp_generic_enable,
239 	.cache_flush		= m1541_cache_flush,
240 	.create_gatt_table	= agp_generic_create_gatt_table,
241 	.free_gatt_table	= agp_generic_free_gatt_table,
242 	.insert_memory		= agp_generic_insert_memory,
243 	.remove_memory		= agp_generic_remove_memory,
244 	.alloc_by_type		= agp_generic_alloc_by_type,
245 	.free_by_type		= agp_generic_free_by_type,
246 	.agp_alloc_page		= m1541_alloc_page,
247 	.agp_destroy_page	= m1541_destroy_page,
248 	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
249 };
250 
251 
252 static struct agp_device_ids ali_agp_device_ids[] =
253 {
254 	{
255 		.device_id	= PCI_DEVICE_ID_AL_M1541,
256 		.chipset_name	= "M1541",
257 	},
258 	{
259 		.device_id	= PCI_DEVICE_ID_AL_M1621,
260 		.chipset_name	= "M1621",
261 	},
262 	{
263 		.device_id	= PCI_DEVICE_ID_AL_M1631,
264 		.chipset_name	= "M1631",
265 	},
266 	{
267 		.device_id	= PCI_DEVICE_ID_AL_M1632,
268 		.chipset_name	= "M1632",
269 	},
270 	{
271 		.device_id	= PCI_DEVICE_ID_AL_M1641,
272 		.chipset_name	= "M1641",
273 	},
274 	{
275 		.device_id	= PCI_DEVICE_ID_AL_M1644,
276 		.chipset_name	= "M1644",
277 	},
278 	{
279 		.device_id	= PCI_DEVICE_ID_AL_M1647,
280 		.chipset_name	= "M1647",
281 	},
282 	{
283 		.device_id	= PCI_DEVICE_ID_AL_M1651,
284 		.chipset_name	= "M1651",
285 	},
286 	{
287 		.device_id	= PCI_DEVICE_ID_AL_M1671,
288 		.chipset_name	= "M1671",
289 	},
290 	{
291 		.device_id	= PCI_DEVICE_ID_AL_M1681,
292 		.chipset_name	= "M1681",
293 	},
294 	{
295 		.device_id	= PCI_DEVICE_ID_AL_M1683,
296 		.chipset_name	= "M1683",
297 	},
298 
299 	{ }, /* dummy final entry, always present */
300 };
301 
agp_ali_probe(struct pci_dev * pdev,const struct pci_device_id * ent)302 static int agp_ali_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
303 {
304 	struct agp_device_ids *devs = ali_agp_device_ids;
305 	struct agp_bridge_data *bridge;
306 	u8 hidden_1621_id, cap_ptr;
307 	int j;
308 
309 	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
310 	if (!cap_ptr)
311 		return -ENODEV;
312 
313 	/* probe for known chipsets */
314 	for (j = 0; devs[j].chipset_name; j++) {
315 		if (pdev->device == devs[j].device_id)
316 			goto found;
317 	}
318 
319 	dev_err(&pdev->dev, "unsupported ALi chipset [%04x/%04x])\n",
320 		pdev->vendor, pdev->device);
321 	return -ENODEV;
322 
323 
324 found:
325 	bridge = agp_alloc_bridge();
326 	if (!bridge)
327 		return -ENOMEM;
328 
329 	bridge->dev = pdev;
330 	bridge->capndx = cap_ptr;
331 
332 	switch (pdev->device) {
333 	case PCI_DEVICE_ID_AL_M1541:
334 		bridge->driver = &ali_m1541_bridge;
335 		break;
336 	case PCI_DEVICE_ID_AL_M1621:
337 		pci_read_config_byte(pdev, 0xFB, &hidden_1621_id);
338 		switch (hidden_1621_id) {
339 		case 0x31:
340 			devs[j].chipset_name = "M1631";
341 			break;
342 		case 0x32:
343 			devs[j].chipset_name = "M1632";
344 			break;
345 		case 0x41:
346 			devs[j].chipset_name = "M1641";
347 			break;
348 		case 0x43:
349 			devs[j].chipset_name = "M1621";
350 			break;
351 		case 0x47:
352 			devs[j].chipset_name = "M1647";
353 			break;
354 		case 0x51:
355 			devs[j].chipset_name = "M1651";
356 			break;
357 		default:
358 			break;
359 		}
360 		fallthrough;
361 	default:
362 		bridge->driver = &ali_generic_bridge;
363 	}
364 
365 	dev_info(&pdev->dev, "ALi %s chipset\n", devs[j].chipset_name);
366 
367 	/* Fill in the mode register */
368 	pci_read_config_dword(pdev,
369 			bridge->capndx+PCI_AGP_STATUS,
370 			&bridge->mode);
371 
372 	pci_set_drvdata(pdev, bridge);
373 	return agp_add_bridge(bridge);
374 }
375 
agp_ali_remove(struct pci_dev * pdev)376 static void agp_ali_remove(struct pci_dev *pdev)
377 {
378 	struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
379 
380 	agp_remove_bridge(bridge);
381 	agp_put_bridge(bridge);
382 }
383 
384 static const struct pci_device_id agp_ali_pci_table[] = {
385 	{
386 	.class		= (PCI_CLASS_BRIDGE_HOST << 8),
387 	.class_mask	= ~0,
388 	.vendor		= PCI_VENDOR_ID_AL,
389 	.device		= PCI_ANY_ID,
390 	.subvendor	= PCI_ANY_ID,
391 	.subdevice	= PCI_ANY_ID,
392 	},
393 	{ }
394 };
395 
396 MODULE_DEVICE_TABLE(pci, agp_ali_pci_table);
397 
398 static struct pci_driver agp_ali_pci_driver = {
399 	.name		= "agpgart-ali",
400 	.id_table	= agp_ali_pci_table,
401 	.probe		= agp_ali_probe,
402 	.remove		= agp_ali_remove,
403 };
404 
agp_ali_init(void)405 static int __init agp_ali_init(void)
406 {
407 	if (agp_off)
408 		return -EINVAL;
409 	return pci_register_driver(&agp_ali_pci_driver);
410 }
411 
agp_ali_cleanup(void)412 static void __exit agp_ali_cleanup(void)
413 {
414 	pci_unregister_driver(&agp_ali_pci_driver);
415 }
416 
417 module_init(agp_ali_init);
418 module_exit(agp_ali_cleanup);
419 
420 MODULE_AUTHOR("Dave Jones");
421 MODULE_DESCRIPTION("ALi AGPGART routines");
422 MODULE_LICENSE("GPL and additional rights");
423 
424