2 * UniNorth AGPGART routines.
4 #include <linux/module.h>
6 #include <linux/init.h>
7 #include <linux/pagemap.h>
8 #include <linux/agp_backend.h>
9 #include <asm/uninorth.h>
10 #include <asm/pci-bridge.h>
13 static int uninorth_fetch_size(void)
17 struct aper_size_info_32
*values
;
19 pci_read_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_BASE
, &temp
);
20 temp
&= ~(0xfffff000);
21 values
= A_SIZE_32(agp_bridge
->driver
->aperture_sizes
);
23 for (i
= 0; i
< agp_bridge
->driver
->num_aperture_sizes
; i
++) {
24 if (temp
== values
[i
].size_value
) {
25 agp_bridge
->previous_size
=
26 agp_bridge
->current_size
= (void *) (values
+ i
);
27 agp_bridge
->aperture_size_idx
= i
;
28 return values
[i
].size
;
32 agp_bridge
->previous_size
=
33 agp_bridge
->current_size
= (void *) (values
+ 1);
34 agp_bridge
->aperture_size_idx
= 1;
35 return values
[1].size
;
40 static void uninorth_tlbflush(struct agp_memory
*mem
)
42 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
43 UNI_N_CFG_GART_ENABLE
| UNI_N_CFG_GART_INVAL
);
44 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
45 UNI_N_CFG_GART_ENABLE
);
46 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
47 UNI_N_CFG_GART_ENABLE
| UNI_N_CFG_GART_2xRESET
);
48 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
49 UNI_N_CFG_GART_ENABLE
);
52 static void uninorth_cleanup(void)
54 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
55 UNI_N_CFG_GART_ENABLE
| UNI_N_CFG_GART_INVAL
);
56 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
58 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
59 UNI_N_CFG_GART_2xRESET
);
60 pci_write_config_dword(agp_bridge
->dev
, UNI_N_CFG_GART_CTRL
,
64 static int uninorth_configure(void)
66 struct aper_size_info_32
*current_size
;
68 current_size
= A_SIZE_32(agp_bridge
->current_size
);
70 printk(KERN_INFO PFX
"configuring for size idx: %d\n",
71 current_size
->size_value
);
73 /* aperture size and gatt addr */
74 pci_write_config_dword(agp_bridge
->dev
,
76 (agp_bridge
->gatt_bus_addr
& 0xfffff000)
77 | current_size
->size_value
);
80 * UniNorth seem to be buggy enough not to handle properly when
81 * the AGP aperture isn't mapped at bus physical address 0
83 agp_bridge
->gart_bus_addr
= 0;
84 pci_write_config_dword(agp_bridge
->dev
,
85 UNI_N_CFG_AGP_BASE
, agp_bridge
->gart_bus_addr
);
90 static int uninorth_insert_memory(struct agp_memory
*mem
, off_t pg_start
,
93 int i
, j
, num_entries
;
96 temp
= agp_bridge
->current_size
;
97 num_entries
= A_SIZE_32(temp
)->num_entries
;
99 if (type
!= 0 || mem
->type
!= 0)
100 /* We know nothing of memory types */
102 if ((pg_start
+ mem
->page_count
) > num_entries
)
107 while (j
< (pg_start
+ mem
->page_count
)) {
108 if (!PGE_EMPTY(agp_bridge
, agp_bridge
->gatt_table
[j
]))
113 for (i
= 0, j
= pg_start
; i
< mem
->page_count
; i
++, j
++) {
114 agp_bridge
->gatt_table
[j
] = cpu_to_le32((mem
->memory
[i
] & 0xfffff000) | 0x00000001UL
);
115 flush_dcache_range((unsigned long)__va(mem
->memory
[i
]),
116 (unsigned long)__va(mem
->memory
[i
])+0x1000);
118 (void)in_le32((volatile u32
*)&agp_bridge
->gatt_table
[pg_start
]);
120 flush_dcache_range((unsigned long)&agp_bridge
->gatt_table
[pg_start
],
121 (unsigned long)&agp_bridge
->gatt_table
[pg_start
+ mem
->page_count
]);
123 uninorth_tlbflush(mem
);
127 static void uninorth_agp_enable(u32 mode
)
129 u32 command
, scratch
;
132 pci_read_config_dword(agp_bridge
->dev
,
133 agp_bridge
->capndx
+ PCI_AGP_STATUS
,
136 command
= agp_collect_device_status(mode
, command
);
139 uninorth_tlbflush(NULL
);
143 pci_write_config_dword(agp_bridge
->dev
,
144 agp_bridge
->capndx
+ PCI_AGP_COMMAND
,
146 pci_read_config_dword(agp_bridge
->dev
,
147 agp_bridge
->capndx
+ PCI_AGP_COMMAND
,
149 } while ((scratch
& 0x100) == 0 && ++timeout
< 1000);
150 if ((scratch
& 0x100) == 0)
151 printk(KERN_ERR PFX
"failed to write UniNorth AGP command reg\n");
153 agp_device_command(command
, 0);
155 uninorth_tlbflush(NULL
);
158 static int uninorth_create_gatt_table(void)
169 /* We can't handle 2 level gatt's */
170 if (agp_bridge
->driver
->size_type
== LVL2_APER_SIZE
)
174 i
= agp_bridge
->aperture_size_idx
;
175 temp
= agp_bridge
->current_size
;
176 size
= page_order
= num_entries
= 0;
179 size
= A_SIZE_32(temp
)->size
;
180 page_order
= A_SIZE_32(temp
)->page_order
;
181 num_entries
= A_SIZE_32(temp
)->num_entries
;
183 table
= (char *) __get_free_pages(GFP_KERNEL
, page_order
);
187 agp_bridge
->current_size
= A_IDX32(agp_bridge
);
189 agp_bridge
->aperture_size_idx
= i
;
191 } while (!table
&& (i
< agp_bridge
->driver
->num_aperture_sizes
));
196 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
198 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
199 SetPageReserved(page
);
201 agp_bridge
->gatt_table_real
= (u32
*) table
;
202 agp_bridge
->gatt_table
= (u32
*)table
;
203 agp_bridge
->gatt_bus_addr
= virt_to_phys(table
);
205 for (i
= 0; i
< num_entries
; i
++) {
206 agp_bridge
->gatt_table
[i
] =
207 (unsigned long) agp_bridge
->scratch_page
;
210 flush_dcache_range((unsigned long)table
, (unsigned long)table_end
);
215 static int uninorth_free_gatt_table(void)
218 char *table
, *table_end
;
222 temp
= agp_bridge
->current_size
;
223 page_order
= A_SIZE_32(temp
)->page_order
;
225 /* Do not worry about freeing memory, because if this is
226 * called, then all agp memory is deallocated and removed
230 table
= (char *) agp_bridge
->gatt_table_real
;
231 table_end
= table
+ ((PAGE_SIZE
* (1 << page_order
)) - 1);
233 for (page
= virt_to_page(table
); page
<= virt_to_page(table_end
); page
++)
234 ClearPageReserved(page
);
236 free_pages((unsigned long) agp_bridge
->gatt_table_real
, page_order
);
241 void null_cache_flush(void)
248 static struct aper_size_info_32 uninorth_sizes
[7] =
250 #if 0 /* Not sure uninorth supports that high aperture sizes */
261 struct agp_bridge_driver uninorth_agp_driver
= {
262 .owner
= THIS_MODULE
,
263 .aperture_sizes
= (void *)uninorth_sizes
,
264 .size_type
= U32_APER_SIZE
,
265 .num_aperture_sizes
= 4,
266 .configure
= uninorth_configure
,
267 .fetch_size
= uninorth_fetch_size
,
268 .cleanup
= uninorth_cleanup
,
269 .tlb_flush
= uninorth_tlbflush
,
270 .mask_memory
= agp_generic_mask_memory
,
272 .cache_flush
= null_cache_flush
,
273 .agp_enable
= uninorth_agp_enable
,
274 .create_gatt_table
= uninorth_create_gatt_table
,
275 .free_gatt_table
= uninorth_free_gatt_table
,
276 .insert_memory
= uninorth_insert_memory
,
277 .remove_memory
= agp_generic_remove_memory
,
278 .alloc_by_type
= agp_generic_alloc_by_type
,
279 .free_by_type
= agp_generic_free_by_type
,
280 .agp_alloc_page
= agp_generic_alloc_page
,
281 .agp_destroy_page
= agp_generic_destroy_page
,
282 .cant_use_aperture
= 1,
285 static struct agp_device_ids uninorth_agp_device_ids
[] __devinitdata
= {
287 .device_id
= PCI_DEVICE_ID_APPLE_UNI_N_AGP
,
288 .chipset_name
= "UniNorth",
291 .device_id
= PCI_DEVICE_ID_APPLE_UNI_N_AGP_P
,
292 .chipset_name
= "UniNorth/Pangea",
295 .device_id
= PCI_DEVICE_ID_APPLE_UNI_N_AGP15
,
296 .chipset_name
= "UniNorth 1.5",
299 .device_id
= PCI_DEVICE_ID_APPLE_UNI_N_AGP2
,
300 .chipset_name
= "UniNorth 2",
304 static int __devinit
agp_uninorth_probe(struct pci_dev
*pdev
,
305 const struct pci_device_id
*ent
)
307 struct agp_device_ids
*devs
= uninorth_agp_device_ids
;
308 struct agp_bridge_data
*bridge
;
312 cap_ptr
= pci_find_capability(pdev
, PCI_CAP_ID_AGP
);
316 /* probe for known chipsets */
317 for (j
= 0; devs
[j
].chipset_name
!= NULL
; ++j
) {
318 if (pdev
->device
== devs
[j
].device_id
) {
319 printk(KERN_INFO PFX
"Detected Apple %s chipset\n",
320 devs
[j
].chipset_name
);
325 printk(KERN_ERR PFX
"Unsupported Apple chipset (device id: %04x).\n",
330 bridge
= agp_alloc_bridge();
334 bridge
->driver
= &uninorth_agp_driver
;
336 bridge
->capndx
= cap_ptr
;
338 /* Fill in the mode register */
339 pci_read_config_dword(pdev
, cap_ptr
+PCI_AGP_STATUS
, &bridge
->mode
);
341 pci_set_drvdata(pdev
, bridge
);
342 return agp_add_bridge(bridge
);
345 static void __devexit
agp_uninorth_remove(struct pci_dev
*pdev
)
347 struct agp_bridge_data
*bridge
= pci_get_drvdata(pdev
);
349 agp_remove_bridge(bridge
);
350 agp_put_bridge(bridge
);
353 static struct pci_device_id agp_uninorth_pci_table
[] = {
355 .class = (PCI_CLASS_BRIDGE_HOST
<< 8),
357 .vendor
= PCI_VENDOR_ID_APPLE
,
358 .device
= PCI_ANY_ID
,
359 .subvendor
= PCI_ANY_ID
,
360 .subdevice
= PCI_ANY_ID
,
365 MODULE_DEVICE_TABLE(pci
, agp_uninorth_pci_table
);
367 static struct pci_driver agp_uninorth_pci_driver
= {
368 .name
= "agpgart-uninorth",
369 .id_table
= agp_uninorth_pci_table
,
370 .probe
= agp_uninorth_probe
,
371 .remove
= agp_uninorth_remove
,
374 static int __init
agp_uninorth_init(void)
376 return pci_module_init(&agp_uninorth_pci_driver
);
379 static void __exit
agp_uninorth_cleanup(void)
381 pci_unregister_driver(&agp_uninorth_pci_driver
);
384 module_init(agp_uninorth_init
);
385 module_exit(agp_uninorth_cleanup
);
387 MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
388 MODULE_LICENSE("GPL");