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PCI: add Intel USB specific reset method

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Handle device specific reset requirements (i.e. vendor reg for reset
along with appropriate timeout).

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Dexuan Cui 2009-12-07 13:03:22 +08:00 committed by Jesse Barnes
parent b9c3b26641
commit aeb30016fe
1 changed files with 24 additions and 0 deletions
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24
drivers/pci/quirks.c
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@ -2642,7 +2642,31 @@ fs_initcall_sync(pci_apply_final_quirks);
* reset a single function if other methods (e.g. FLR, PM D0->D3) are * reset a single function if other methods (e.g. FLR, PM D0->D3) are
* not available. * not available.
*/ */
static int reset_intel_generic_dev(struct pci_dev *dev, int probe)
{
int pos;
/* only implement PCI_CLASS_SERIAL_USB at present */
if (dev->class == PCI_CLASS_SERIAL_USB) {
pos = pci_find_capability(dev, PCI_CAP_ID_VNDR);
if (!pos)
return -ENOTTY;
if (probe)
return 0;
pci_write_config_byte(dev, pos + 0x4, 1);
msleep(100);
return 0;
} else {
return -ENOTTY;
}
}
struct pci_dev_reset_methods pci_dev_reset_methods[] = { struct pci_dev_reset_methods pci_dev_reset_methods[] = {
{ PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
reset_intel_generic_dev },
{ 0 } { 0 }
}; };
#else #else