Commit dc509d28 authored by Dave Jones's avatar Dave Jones Committed by Linus Torvalds

[AGPGART] PPC Uninorth support.

By Paul Mackerras and BenH
parent 40f911f6
......@@ -131,3 +131,10 @@ config AGP_ALPHA_CORE
depends on AGP && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL)
default AGP
config AGP_UNINORTH
tristate "Apple UniNorth AGP support"
depends on AGP && ALL_PPC
help
This option gives you AGP support for Apple machines with a
UniNorth bridge.
......@@ -11,5 +11,6 @@ obj-$(CONFIG_AGP_INTEL) += intel-agp.o
obj-$(CONFIG_AGP_NVIDIA) += nvidia-agp.o
obj-$(CONFIG_AGP_SIS) += sis-agp.o
obj-$(CONFIG_AGP_SWORKS) += sworks-agp.o
obj-$(CONFIG_AGP_UNINORTH) += uninorth-agp.o
obj-$(CONFIG_AGP_VIA) += via-agp.o
/*
* UniNorth AGPGART routines.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/pagemap.h>
#include <linux/agp_backend.h>
#include <asm/uninorth.h>
#include <asm/pci-bridge.h>
#include "agp.h"
static int agp_try_unsupported __initdata = 0;
static int uninorth_fetch_size(void)
{
int i;
u32 temp;
struct aper_size_info_32 *values;
pci_read_config_dword(agp_bridge->dev, UNI_N_CFG_GART_BASE, &temp);
temp &= ~(0xfffff000);
values = A_SIZE_32(agp_bridge->driver->aperture_sizes);
for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
if (temp == values[i].size_value) {
agp_bridge->previous_size =
agp_bridge->current_size = (void *) (values + i);
agp_bridge->aperture_size_idx = i;
return values[i].size;
}
}
agp_bridge->previous_size =
agp_bridge->current_size = (void *) (values + 1);
agp_bridge->aperture_size_idx = 1;
return values[1].size;
return 0;
}
static void uninorth_tlbflush(agp_memory * mem)
{
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_ENABLE);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_2xRESET);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_ENABLE);
}
static void uninorth_cleanup(void)
{
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_ENABLE | UNI_N_CFG_GART_INVAL);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
0);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
UNI_N_CFG_GART_2xRESET);
pci_write_config_dword(agp_bridge->dev, UNI_N_CFG_GART_CTRL,
0);
}
static int uninorth_configure(void)
{
struct aper_size_info_32 *current_size;
current_size = A_SIZE_32(agp_bridge->current_size);
printk(KERN_INFO PFX "configuring for size idx: %d\n",
current_size->size_value);
/* aperture size and gatt addr */
pci_write_config_dword(agp_bridge->dev,
UNI_N_CFG_GART_BASE,
(agp_bridge->gatt_bus_addr & 0xfffff000)
| current_size->size_value);
/* HACK ALERT
* UniNorth seem to be buggy enough not to handle properly when
* the AGP aperture isn't mapped at bus physical address 0
*/
agp_bridge->gart_bus_addr = 0;
pci_write_config_dword(agp_bridge->dev,
UNI_N_CFG_AGP_BASE, agp_bridge->gart_bus_addr);
return 0;
}
static unsigned long uninorth_mask_memory(unsigned long addr, int type)
{
return addr;/* | agp_bridge->driver->masks[0].mask;*/
}
static int uninorth_insert_memory(agp_memory * mem, off_t pg_start, int type)
{
int i, j, num_entries;
void *temp;
temp = agp_bridge->current_size;
num_entries = A_SIZE_32(temp)->num_entries;
if (type != 0 || mem->type != 0)
/* We know nothing of memory types */
return -EINVAL;
if ((pg_start + mem->page_count) > num_entries)
return -EINVAL;
j = pg_start;
while (j < (pg_start + mem->page_count)) {
if (!PGE_EMPTY(agp_bridge, agp_bridge->gatt_table[j]))
return -EBUSY;
j++;
}
for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
agp_bridge->gatt_table[j] = cpu_to_le32((mem->memory[i] & 0xfffff000) | 0x00000001UL);
flush_dcache_range((unsigned long)__va(mem->memory[i]),
(unsigned long)__va(mem->memory[i])+0x1000);
}
(void)in_le32((volatile u32*)&agp_bridge->gatt_table[pg_start]);
mb();
flush_dcache_range((unsigned long)&agp_bridge->gatt_table[pg_start],
(unsigned long)&agp_bridge->gatt_table[pg_start + mem->page_count]);
uninorth_tlbflush(mem);
return 0;
}
static void uninorth_agp_enable(u32 mode)
{
u32 command, scratch;
int timeout;
pci_read_config_dword(agp_bridge->dev,
agp_bridge->capndx + PCI_AGP_STATUS,
&command);
command = agp_collect_device_status(mode, command);
command |= 0x100;
uninorth_tlbflush(NULL);
timeout = 0;
do {
pci_write_config_dword(agp_bridge->dev,
agp_bridge->capndx + PCI_AGP_COMMAND,
command);
pci_read_config_dword(agp_bridge->dev,
agp_bridge->capndx + PCI_AGP_COMMAND,
&scratch);
} while ((scratch & 0x100) == 0 && ++timeout < 1000);
if ((scratch & 0x100) == 0)
printk(KERN_ERR PFX "failed to write UniNorth AGP command reg\n");
agp_device_command(command, 0);
uninorth_tlbflush(NULL);
}
static int uninorth_create_gatt_table(void)
{
char *table;
char *table_end;
int size;
int page_order;
int num_entries;
int i;
void *temp;
struct page *page;
/* We can't handle 2 level gatt's */
if (agp_bridge->driver->size_type == LVL2_APER_SIZE)
return -EINVAL;
table = NULL;
i = agp_bridge->aperture_size_idx;
temp = agp_bridge->current_size;
size = page_order = num_entries = 0;
do {
size = A_SIZE_32(temp)->size;
page_order = A_SIZE_32(temp)->page_order;
num_entries = A_SIZE_32(temp)->num_entries;
table = (char *) __get_free_pages(GFP_KERNEL, page_order);
if (table == NULL) {
i++;
agp_bridge->current_size = A_IDX32(agp_bridge);
} else {
agp_bridge->aperture_size_idx = i;
}
} while (!table && (i < agp_bridge->driver->num_aperture_sizes));
if (table == NULL)
return -ENOMEM;
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
SetPageReserved(page);
agp_bridge->gatt_table_real = (u32 *) table;
agp_bridge->gatt_table = (u32 *)table;
agp_bridge->gatt_bus_addr = virt_to_phys(table);
for (i = 0; i < num_entries; i++) {
agp_bridge->gatt_table[i] =
(unsigned long) agp_bridge->scratch_page;
}
flush_dcache_range((unsigned long)table, (unsigned long)table_end);
return 0;
}
static int uninorth_free_gatt_table(void)
{
int page_order;
char *table, *table_end;
void *temp;
struct page *page;
temp = agp_bridge->current_size;
page_order = A_SIZE_32(temp)->page_order;
/* Do not worry about freeing memory, because if this is
* called, then all agp memory is deallocated and removed
* from the table.
*/
table = (char *) agp_bridge->gatt_table_real;
table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
ClearPageReserved(page);
free_pages((unsigned long) agp_bridge->gatt_table_real, page_order);
return 0;
}
void null_cache_flush(void)
{
mb();
}
/* Setup function */
static struct gatt_mask uninorth_masks[] =
{
{0x00000000, 0}
};
static struct aper_size_info_32 uninorth_sizes[7] =
{
#if 0 /* Not sure uninorth supports that high aperture sizes */
{256, 65536, 6, 64},
{128, 32768, 5, 32},
{64, 16384, 4, 16},
#endif
{32, 8192, 3, 8},
{16, 4096, 2, 4},
{8, 2048, 1, 2},
{4, 1024, 0, 1}
};
struct agp_bridge_driver uninorth_agp_driver = {
.owner = THIS_MODULE,
.masks = uninorth_masks,
.aperture_sizes = (void *)uninorth_sizes,
.size_type = U32_APER_SIZE,
.num_aperture_sizes = 4,
.configure = uninorth_configure,
.fetch_size = uninorth_fetch_size,
.cleanup = uninorth_cleanup,
.tlb_flush = uninorth_tlbflush,
.mask_memory = uninorth_mask_memory,
.cache_flush = null_cache_flush,
.agp_enable = uninorth_agp_enable,
.create_gatt_table = uninorth_create_gatt_table,
.free_gatt_table = uninorth_free_gatt_table,
.insert_memory = uninorth_insert_memory,
.remove_memory = agp_generic_remove_memory,
.alloc_by_type = agp_generic_alloc_by_type,
.free_by_type = agp_generic_free_by_type,
.agp_alloc_page = agp_generic_alloc_page,
.agp_destroy_page = agp_generic_destroy_page,
.suspend = agp_generic_suspend,
.resume = agp_generic_resume,
.cant_use_aperture = 1,
};
struct agp_device_ids uninorth_agp_device_ids[] __initdata = {
{
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP,
.chipset_name = "UniNorth",
},
{
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP_P,
.chipset_name = "UniNorth/Pangea",
},
{
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP15,
.chipset_name = "UniNorth 1.5",
},
{
.device_id = PCI_DEVICE_ID_APPLE_UNI_N_AGP2,
.chipset_name = "UniNorth 2",
},
};
static int __init agp_uninorth_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct agp_device_ids *devs = uninorth_agp_device_ids;
struct agp_bridge_data *bridge;
u8 cap_ptr;
int j;
cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
if (cap_ptr == 0)
return -ENODEV;
/* probe for known chipsets */
for (j = 0; devs[j].chipset_name != NULL; ++j) {
if (pdev->device == devs[j].device_id) {
printk(KERN_INFO PFX "Detected Apple %s chipset\n",
devs[j].chipset_name);
goto found;
}
}
if (!agp_try_unsupported) {
printk(KERN_ERR PFX "Unsupported Apple chipset"
" (device id: %04x).\n", pdev->device);
printk(KERN_ERR PFX "You might want to try"
" agp_try_unsupported=1\n");
return -ENODEV;
}
printk(KERN_ERR PFX "Trying generic Uninorth routines"
" for device id %04x\n", pdev->device);
found:
bridge = agp_alloc_bridge();
if (!bridge)
return -ENOMEM;
bridge->driver = &uninorth_agp_driver;
bridge->dev = pdev;
bridge->capndx = cap_ptr;
/* Fill in the mode register */
pci_read_config_dword(pdev, cap_ptr+PCI_AGP_STATUS, &bridge->mode);
pci_set_drvdata(pdev, bridge);
return agp_add_bridge(bridge);
}
static void __devexit agp_uninorth_remove(struct pci_dev *pdev)
{
struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
agp_remove_bridge(bridge);
agp_put_bridge(bridge);
}
static struct pci_device_id agp_uninorth_pci_table[] __initdata = {
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_APPLE,
.device = PCI_ANY_ID,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{ }
};
MODULE_DEVICE_TABLE(pci, agp_uninorth_pci_table);
static struct __initdata pci_driver agp_uninorth_pci_driver = {
.name = "agpgart-uninorth",
.id_table = agp_uninorth_pci_table,
.probe = agp_uninorth_probe,
.remove = agp_uninorth_remove,
};
static int __init agp_uninorth_init(void)
{
return pci_module_init(&agp_uninorth_pci_driver);
}
static void __exit agp_uninorth_cleanup(void)
{
pci_unregister_driver(&agp_uninorth_pci_driver);
}
module_init(agp_uninorth_init);
module_exit(agp_uninorth_cleanup);
MODULE_PARM(agp_try_unsupported, "1i");
MODULE_AUTHOR("Ben Herrenschmidt & Paul Mackerras");
MODULE_LICENSE("GPL");
#ifndef AGP_H
#define AGP_H 1
#include <asm/io.h>
/* nothing much needed here */
#define map_page_into_agp(page)
#define unmap_page_from_agp(page)
#define flush_agp_mappings()
#define flush_agp_cache() mb()
#endif
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