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);
}
void agp_generic_enable(u32_t requested_mode)
{
u32_t bridge_agpstat, temp;
get_agp_version(bridge);
dbgprintf("Found an AGP %d.%d compliant device.\n",
bridge->major_version, bridge->minor_version);
bridge_agpstat = pciReadLong(bridge->PciTag,
bridge->capndx + PCI_AGP_STATUS);
bridge_agpstat = agp_collect_device_status(bridge, requested_mode, bridge_agpstat);
if (bridge_agpstat == 0)
/* Something bad happened. FIXME: Return error code? */
return;
bridge_agpstat |= AGPSTAT_AGP_ENABLE;
/* Do AGP version specific frobbing. */
if (bridge->major_version >= 3)
{
if (bridge->mode & AGPSTAT_MODE_3_0)
{
/* If we have 3.5, we can do the isoch stuff. */
if (bridge->minor_version >= 5)
agp_3_5_enable(bridge);
agp_device_command(bridge_agpstat, TRUE);
return;
}
else
{
/* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/
bridge_agpstat &= ~(7<<10) ;
temp = pciReadLong(bridge->PciTag, bridge->capndx+AGPCTRL);
temp |= (1<<9);
pciWriteLong(bridge->PciTag, bridge->capndx+AGPCTRL, temp);
dbgprintf("Device is in legacy mode,"
" falling back to 2.x\n");
}
}
/* AGP v<3 */
agp_device_command(bridge_agpstat, FALSE);
}
static void alpha_core_agp_enable(u32 mode)
{
alpha_agp_info *agp = agp_bridge->dev_private_data;
agp->mode.lw = agp_collect_device_status(mode, agp->capability.lw);
agp->mode.bits.enable = 1;
agp->ops->configure(agp);
agp_device_command(agp->mode.lw, 0);
}
static void
hp_zx1_enable (struct agp_bridge_data *bridge, u32 mode)
{
struct _hp_private *hp = &hp_private;
u32 command;
command = readl(hp->lba_regs+hp->lba_cap_offset+PCI_AGP_STATUS);
command = agp_collect_device_status(bridge, mode, command);
command |= 0x00000100;
writel(command, hp->lba_regs+hp->lba_cap_offset+PCI_AGP_COMMAND);
agp_device_command(command, (mode & AGP8X_MODE) != 0);
}
static void
hp_zx1_enable (u32 mode)
{
struct _hp_private *hp = &hp_private;
u32 command;
command = INREG32(hp->lba_regs, hp->lba_cap_offset + PCI_AGP_STATUS);
command = agp_collect_device_status(mode, command);
command |= 0x00000100;
OUTREG32(hp->lba_regs, hp->lba_cap_offset + PCI_AGP_COMMAND, command);
agp_device_command(command, (mode & AGP8X_MODE) != 0);
}
static void serverworks_agp_enable(struct agp_bridge_data *bridge, u32 mode)
{
u32 command;
pci_read_config_dword(serverworks_private.svrwrks_dev,
bridge->capndx + PCI_AGP_STATUS,
&command);
command = agp_collect_device_status(bridge, mode, command);
command &= ~0x10; /* disable FW */
command &= ~0x08;
command |= 0x100;
pci_write_config_dword(serverworks_private.svrwrks_dev,
bridge->capndx + PCI_AGP_COMMAND,
command);
agp_device_command(command, false);
}