From aeb30016fec3378c543cae33654c2144277fe674 Mon Sep 17 00:00:00 2001
From: Dexuan Cui <dexuan.cui@intel.com>
Date: Mon, 7 Dec 2009 13:03:22 +0800
Subject: [PATCH] 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>
---
drivers/pci/quirks.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
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
--
2.34.1