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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/agp/sis-agp.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/agp/sis-agp.c')
-rw-r--r-- | drivers/char/agp/sis-agp.c | 360 |
1 files changed, 360 insertions, 0 deletions
diff --git a/drivers/char/agp/sis-agp.c b/drivers/char/agp/sis-agp.c new file mode 100644 index 0000000..cfccacb --- /dev/null +++ b/drivers/char/agp/sis-agp.c @@ -0,0 +1,360 @@ +/* + * 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} +}; + +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"); |