/* * SiS AGPGART routines.  */#include <linux/module.h>#include <linux/pci.h>#include <linux/init.h>#include <linux/agp_backend.h>#include "agp.h"#define SIS_ATTBASE	0x90#define SIS_APSIZE	0x94#define SIS_TLBCNTRL	0x97#define SIS_TLBFLUSH	0x98static 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(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,		agp_bridge->dev->slot_name);	pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);	command = agp_collect_device_status(mode, command);	command |= AGPSTAT_AGP_ENABLE;	rate = (command & 0x7) << 2;	while ((device = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, device)) != NULL) {		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 == agp_bridge->dev->device) {			printk(KERN_INFO PFX "SiS delay workaround: giving bridge time to recover.\n");			set_current_state(TASK_UNINTERRUPTIBLE);			schedule_timeout (1+(HZ*10)/1000);		}	}}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_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){	return pci_module_init(&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_PARM(agp_sis_force_delay,"i");MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");MODULE_PARM(agp_sis_agp_spec,"i");MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");MODULE_LICENSE("GPL and additional rights");