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Diffstat (limited to 'drivers/firewire/ohci.c')
-rw-r--r--drivers/firewire/ohci.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index e934713f3fce..6a27a0ef3b63 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -2431,7 +2431,7 @@ static int __devinit pci_probe(struct pci_dev *dev,
const struct pci_device_id *ent)
{
struct fw_ohci *ohci;
- u32 bus_options, max_receive, link_speed, version;
+ u32 bus_options, max_receive, link_speed, version, link_enh;
u64 guid;
int i, err, n_ir, n_it;
size_t size;
@@ -2484,6 +2484,23 @@ static int __devinit pci_probe(struct pci_dev *dev,
if (param_quirks)
ohci->quirks = param_quirks;
+ /* TI OHCI-Lynx and compatible: set recommended configuration bits. */
+ if (dev->vendor == PCI_VENDOR_ID_TI) {
+ pci_read_config_dword(dev, PCI_CFG_TI_LinkEnh, &link_enh);
+
+ /* adjust latency of ATx FIFO: use 1.7 KB threshold */
+ link_enh &= ~TI_LinkEnh_atx_thresh_mask;
+ link_enh |= TI_LinkEnh_atx_thresh_1_7K;
+
+ /* use priority arbitration for asynchronous responses */
+ link_enh |= TI_LinkEnh_enab_unfair;
+
+ /* required for aPhyEnhanceEnable to work */
+ link_enh |= TI_LinkEnh_enab_accel;
+
+ pci_write_config_dword(dev, PCI_CFG_TI_LinkEnh, link_enh);
+ }
+
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);

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