firewire: ohci: add cycle timer quirk for the TI TSB12LV22

Among the many entries in the TSB12LV22 errata list (TI literature
number SLLS312) is the following:

  PCI Slave reads of the Cycle Timer register may occasionally get an
  incorrect value.
  Software may be able to validate value by reading the register
  multiple times rapidly and evaluating for a reasonable difference.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de> (untested)
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (added #define)

diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 75dc698..e33917b 100644 (file)
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -231,6 +231,8 @@ static inline struct fw_ohci *fw_ohci(struct fw_card *card)
 
 static char ohci_driver_name[] = KBUILD_MODNAME;
 
+#define PCI_DEVICE_ID_TI_TSB12LV22     0x8009
+
 #define QUIRK_CYCLE_TIMER              1
 #define QUIRK_RESET_PACKET             2
 #define QUIRK_BE_HEADERS               4
@@ -239,6 +241,8 @@ static char ohci_driver_name[] = KBUILD_MODNAME;
 static const struct {
        unsigned short vendor, device, flags;
 } ohci_quirks[] = {
+       {PCI_VENDOR_ID_TI,      PCI_DEVICE_ID_TI_TSB12LV22, QUIRK_CYCLE_TIMER |
+                                                           QUIRK_RESET_PACKET},
        {PCI_VENDOR_ID_TI,      PCI_ANY_ID,     QUIRK_RESET_PACKET},
        {PCI_VENDOR_ID_AL,      PCI_ANY_ID,     QUIRK_CYCLE_TIMER},
        {PCI_VENDOR_ID_NEC,     PCI_ANY_ID,     QUIRK_CYCLE_TIMER},