/*
* SiS AGPGART routines.
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/agp_backend.h>
#include <linux/delay.h>
#include "agp.h"
#define SIS_ATTBASE 0x90
#define SIS_APSIZE 0x94
#define SIS_TLBCNTRL 0x97
#define SIS_TLBFLUSH 0x98
static int __devinitdata agp_sis_force_delay = 0;
static int __devinitdata agp_sis_agp_spec = -1;
static int sis_fetch_size(void)
{
u8 temp_size;
int i;
struct aper_size_info_8 *values;
pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
if ((temp_size == values[i].size_value) ||
((temp_size & ~(0x03)) ==
(values[i].size_value & ~(0x03)))) {
agp_bridge->previous_size =
agp_bridge->current_size = (void *) (values + i);
agp_bridge->aperture_size_idx = i;
return values[i].size;
}
}
return 0;
}
static void sis_tlbflush(struct agp_memory *mem)
{
pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
}
static int sis_configure(void)
{
u32 temp;
struct aper_size_info_8 *current_size;
current_size = A_SIZE_8(agp_bridge->current_size);
pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
agp_bridge->gatt_bus_addr);
pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
current_size->size_value);
return 0;
}
static void sis_cleanup(void)
{
struct aper_size_info_8 *previous_size;
previous_size = A_SIZE_8(agp_bridge->previous_size);
pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
(previous_size->size_value & ~(0x03)));
}
static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
{
struct pci_dev *device = NULL;
u32 command;
int rate;
printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n",
agp_bridge->major_version,
agp_bridge->minor_version,
pci_name(agp_bridge->dev));
pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
command = agp_collect_device_status(bridge, mode, command);
command |= AGPSTAT_AGP_ENABLE;
rate = (command & 0x7) << 2;
for_each_pci_dev(device) {
u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
if (!agp)
continue;
printk(KERN_INFO PFX "Putting AGP V3 device at %s into %dx mode\n",
pci_name(device), rate);
pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
/*
* Weird: on some sis chipsets any rate change in the target
* command register triggers a 5ms screwup during which the master
* cannot be configured
*/
if (device->device == bridge->dev->device) {
printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");
msleep(10);
}
}
}
static struct aper_size_info_8 sis_generic_sizes[7] =
{
{256, 65536, 6, 99},
{128, 32768, 5, 83},
{64, 16384, 4, 67},
{32, 8192, 3, 51},
{16, 4096, 2, 35},
{8, 2048, 1, 19},
{4, 1024, 0, 3}
};
static struct agp_bridge_driver sis_driver = {
.owner = THIS_MODULE,
.aperture_sizes = sis_generic_sizes,
.size_type = U8_APER_SIZE,
.num_aperture_sizes = 7,
.configure = sis_configure,
.fetch_size = sis_fetch_size,
.cleanup = sis_cleanup,
.tlb_flush = sis_tlbflush,
.mask_memory = agp_generic_mask_memory,
.masks = NULL,
.agp_enable = agp_generic_enable,
.cache_flush = global_cache_flush,
.create_gatt_table = agp_generic_create_gatt_table,
.free_gatt_table = agp_generic_free_gatt_table,
.insert_memory = agp_generic_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,
};
static struct agp_device_ids sis_agp_device_ids[] __devinitdata =
{
{
.device_id = PCI_DEVICE_ID_SI_5591_AGP,
.chipset_name = "5591",
},
{
.device_id = PCI_DEVICE_ID_SI_530,
.chipset_name = "530",
},
{
.device_id = PCI_DEVICE_ID_SI_540,
.chipset_name = "540",
},
{
.device_id = PCI_DEVICE_ID_SI_550,
.chipset_name = "550",
},
{
.device_id = PCI_DEVICE_ID_SI_620,
.chipset_name = "620",
},
{
.device_id = PCI_DEVICE_ID_SI_630,
.chipset_name = "630",
},
{
.device_id = PCI_DEVICE_ID_SI_635,
.chipset_name = "635",
},
{
.device_id = PCI_DEVICE_ID_SI_645,
.chipset_name = "645",
},
{
.device_id = PCI_DEVICE_ID_SI_646,
.chipset_name = "646",
},
{
.device_id = PCI_DEVICE_ID_SI_648,
.chipset_name = "648",
},
{
.device_id = PCI_DEVICE_ID_SI_650,
.chipset_name = "650",
},
{
.device_id = PCI_DEVICE_ID_SI_651,
.chipset_name = "651",
},
{
.device_id = PCI_DEVICE_ID_SI_655,
.chipset_name = "655",
},
{
.device_id = PCI_DEVICE_ID_SI_661,
.chipset_name = "661",
},
{
.device_id = PCI_DEVICE_ID_SI_730,
.chipset_name = "730",
},
{
.device_id = PCI_DEVICE_ID_SI_735,
.chipset_name = "735",
},
{
.device_id = PCI_DEVICE_ID_SI_740,
.chipset_name = "740",
},
{
.device_id = PCI_DEVICE_ID_SI_741,
.chipset_name = "741",
},
{
.device_id = PCI_DEVICE_ID_SI_745,
.chipset_name = "745",
},
{
.device_id = PCI_DEVICE_ID_SI_746,
.chipset_name = "746",
},
{
.device_id = PCI_DEVICE_ID_SI_760,
.chipset_name = "760",
},
{ }, /* dummy final entry, always present */
};
// chipsets that require the 'delay hack'
static int sis_broken_chipsets[] __devinitdata = {
PCI_DEVICE_ID_SI_648,
PCI_DEVICE_ID_SI_746,
0 // terminator
};
static void __devinit sis_get_driver(struct agp_bridge_data *bridge)
{
int i;
for (i=0; sis_broken_chipsets[i]!=0; ++i)
if (bridge->dev->device==sis_broken_chipsets[i])
break;
if (sis_broken_chipsets[i] || agp_sis_force_delay)
sis_driver.agp_enable=sis_delayed_enable;
// sis chipsets that indicate less than agp3.5
// are not actually fully agp3 compliant
if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
&& agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
sis_driver.aperture_sizes = agp3_generic_sizes;
sis_driver.size_type = U16_APER_SIZE;
sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
sis_driver.configure = agp3_generic_configure;
sis_driver.fetch_size = agp3_generic_fetch_size;
sis_driver.cleanup = agp3_generic_cleanup;
sis_driver.tlb_flush = agp3_generic_tlbflush;
}
}
static int __devinit agp_sis_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
struct agp_device_ids *devs = sis_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)
return -ENODEV;
/* probe for known chipsets */
for (j = 0; devs[j].chipset_name; j++) {
if (pdev->device == devs[j].device_id) {
printk(KERN_INFO PFX "Detected SiS %s chipset\n",
devs[j].chipset_name);
goto found;
}
}
printk(KERN_ERR PFX "Unsupported SiS chipset (device id: %04x)\n",
pdev->device);
return -ENODEV;
found:
bridge = agp_alloc_bridge();
if (!bridge)
return -ENOMEM;
bridge->driver = &sis_driver;
bridge->dev = pdev;
bridge->capndx = cap_ptr;
get_agp_version(bridge);
/* Fill in the mode register */
pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
sis_get_driver(bridge);
pci_set_drvdata(pdev, bridge);
return agp_add_bridge(bridge);
}
static void __devexit agp_sis_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_sis_pci_table[] = {
{
.class = (PCI_CLASS_BRIDGE_HOST << 8),
.class_mask = ~0,
.vendor = PCI_VENDOR_ID_SI,
.device = PCI_ANY_ID,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
},
{ }
};
MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
static struct pci_driver agp_sis_pci_driver = {
.name = "agpgart-sis",
.id_table = agp_sis_pci_table,
.probe = agp_sis_probe,
.remove = agp_sis_remove,
};
static int __init agp_sis_init(void)
{
if (agp_off)
return -EINVAL;
return pci_register_driver(&agp_sis_pci_driver);
}
static void __exit agp_sis_cleanup(void)
{
pci_unregister_driver(&agp_sis_pci_driver);
}
module_init(agp_sis_init);
module_exit(agp_sis_cleanup);
module_param(agp_sis_force_delay, bool, 0);
MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
module_param(agp_sis_agp_spec, int, 0);
MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
MODULE_LICENSE("GPL and additional rights");
