diff options
| author | Dexuan Cui <dexuan.cui@intel.com> | 2009-12-07 13:03:22 +0800 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-12-16 13:37:51 -0800 |
| commit | aeb30016fec3378c543cae33654c2144277fe674 (patch) | |
| tree | f45c459334b963634d0c54aab4d3c0ff46e686b1 /drivers/pci/quirks.c | |
| parent | b9c3b266411d27f1a6466c19d146d08db576bfea (diff) | |
PCI: add Intel USB specific reset method
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>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 86c9177a6c6c..cf96776d4bbf 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -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 * 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[] = { + { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, + reset_intel_generic_dev }, { 0 } }; #else |