diff options
| author | Michael Buesch <mb@bu3sch.de> | 2008-02-16 18:13:36 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-02-20 20:11:55 -0500 |
| commit | fc71acc846c577473ada72a46c5ea9c935eca086 (patch) | |
| tree | aa867b9fdc1f9dcaaf8186c84e101587d67481ce /drivers | |
| parent | 5078ed50712aa3df1099540b524d01075aee653f (diff) | |
ssb: Fix support for PCI devices behind a SSB->PCI bridge
We must pin all resources and make sure the PCI subsystem
won't relocate us, as the addresses are hardwired into hardware.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ssb/driver_pcicore.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/ssb/driver_pcicore.c b/drivers/ssb/driver_pcicore.c index 059452fbb16..6d99a988005 100644 --- a/drivers/ssb/driver_pcicore.c +++ b/drivers/ssb/driver_pcicore.c @@ -79,6 +79,7 @@ int pcibios_plat_dev_init(struct pci_dev *d) base = &ssb_pcicore_pcibus_iobase; else base = &ssb_pcicore_pcibus_membase; + res->flags |= IORESOURCE_PCI_FIXED; if (res->end) { size = res->end - res->start + 1; if (*base & (size - 1)) @@ -101,10 +102,12 @@ int pcibios_plat_dev_init(struct pci_dev *d) static void __init ssb_fixup_pcibridge(struct pci_dev *dev) { + u8 lat; + if (dev->bus->number != 0 || PCI_SLOT(dev->devfn) != 0) return; - ssb_printk(KERN_INFO "PCI: fixing up bridge\n"); + ssb_printk(KERN_INFO "PCI: Fixing up bridge %s\n", pci_name(dev)); /* Enable PCI bridge bus mastering and memory space */ pci_set_master(dev); @@ -114,7 +117,10 @@ static void __init ssb_fixup_pcibridge(struct pci_dev *dev) pci_write_config_dword(dev, SSB_BAR1_CONTROL, 3); /* Make sure our latency is high enough to handle the devices behind us */ - pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xa8); + lat = 168; + ssb_printk(KERN_INFO "PCI: Fixing latency timer of device %s to %u\n", + pci_name(dev), lat); + pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat); } DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, ssb_fixup_pcibridge); @@ -294,14 +300,14 @@ static struct resource ssb_pcicore_mem_resource = { .name = "SSB PCIcore external memory", .start = SSB_PCI_DMA, .end = SSB_PCI_DMA + SSB_PCI_DMA_SZ - 1, - .flags = IORESOURCE_MEM, + .flags = IORESOURCE_MEM | IORESOURCE_PCI_FIXED, }; static struct resource ssb_pcicore_io_resource = { .name = "SSB PCIcore external I/O", .start = 0x100, .end = 0x7FF, - .flags = IORESOURCE_IO, + .flags = IORESOURCE_IO | IORESOURCE_PCI_FIXED, }; static struct pci_controller ssb_pcicore_controller = { @@ -368,7 +374,8 @@ static void ssb_pcicore_init_hostmode(struct ssb_pcicore *pc) /* Ok, ready to run, register it to the system. * The following needs change, if we want to port hostmode * to non-MIPS platform. */ - set_io_port_base((unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000)); + ssb_pcicore_controller.io_map_base = (unsigned long)ioremap_nocache(SSB_PCI_MEM, 0x04000000); + set_io_port_base(ssb_pcicore_controller.io_map_base); /* Give some time to the PCI controller to configure itself with the new * values. Not waiting at this point causes crashes of the machine. */ mdelay(10); |