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path: root/drivers/firewire/fw-ohci.c
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Diffstat (limited to 'drivers/firewire/fw-ohci.c')
-rw-r--r--drivers/firewire/fw-ohci.c37
1 files changed, 24 insertions, 13 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index 333b12544dd..a4eff32621b 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -171,7 +171,6 @@ struct iso_context {
struct fw_ohci {
struct fw_card card;
- u32 version;
__iomem char *registers;
dma_addr_t self_id_bus;
__le32 *self_id_cpu;
@@ -180,6 +179,8 @@ struct fw_ohci {
int generation;
int request_generation; /* for timestamping incoming requests */
u32 bus_seconds;
+
+ bool use_dualbuffer;
bool old_uninorth;
bool bus_reset_packet_quirk;
@@ -1885,7 +1886,7 @@ ohci_allocate_iso_context(struct fw_card *card, int type, size_t header_size)
} else {
mask = &ohci->ir_context_mask;
list = ohci->ir_context_list;
- if (ohci->version >= OHCI_VERSION_1_1)
+ if (ohci->use_dualbuffer)
callback = handle_ir_dualbuffer_packet;
else
callback = handle_ir_packet_per_buffer;
@@ -1949,7 +1950,7 @@ static int ohci_start_iso(struct fw_iso_context *base,
} else {
index = ctx - ohci->ir_context_list;
control = IR_CONTEXT_ISOCH_HEADER;
- if (ohci->version >= OHCI_VERSION_1_1)
+ if (ohci->use_dualbuffer)
control |= IR_CONTEXT_DUAL_BUFFER_MODE;
match = (tags << 28) | (sync << 8) | ctx->base.channel;
if (cycle >= 0) {
@@ -2279,7 +2280,7 @@ ohci_queue_iso(struct fw_iso_context *base,
spin_lock_irqsave(&ctx->context.ohci->lock, flags);
if (base->type == FW_ISO_CONTEXT_TRANSMIT)
retval = ohci_queue_iso_transmit(base, packet, buffer, payload);
- else if (ctx->context.ohci->version >= OHCI_VERSION_1_1)
+ else if (ctx->context.ohci->use_dualbuffer)
retval = ohci_queue_iso_receive_dualbuffer(base, packet,
buffer, payload);
else
@@ -2341,7 +2342,7 @@ 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;
+ u32 bus_options, max_receive, link_speed, version;
u64 guid;
int err;
size_t size;
@@ -2366,12 +2367,6 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
pci_write_config_dword(dev, OHCI1394_PCI_HCI_Control, 0);
pci_set_drvdata(dev, ohci);
-#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
- ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
- dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
-#endif
- ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
-
spin_lock_init(&ohci->lock);
tasklet_init(&ohci->bus_reset_tasklet,
@@ -2390,6 +2385,23 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
goto fail_iomem;
}
+ version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
+ ohci->use_dualbuffer = version >= OHCI_VERSION_1_1;
+
+/* x86-32 currently doesn't use highmem for dma_alloc_coherent */
+#if !defined(CONFIG_X86_32)
+ /* dual-buffer mode is broken with descriptor addresses above 2G */
+ if (dev->vendor == PCI_VENDOR_ID_TI &&
+ dev->device == PCI_DEVICE_ID_TI_TSB43AB22)
+ ohci->use_dualbuffer = false;
+#endif
+
+#if defined(CONFIG_PPC_PMAC) && defined(CONFIG_PPC32)
+ ohci->old_uninorth = dev->vendor == PCI_VENDOR_ID_APPLE &&
+ dev->device == PCI_DEVICE_ID_APPLE_UNI_N_FW;
+#endif
+ ohci->bus_reset_packet_quirk = dev->vendor == PCI_VENDOR_ID_TI;
+
ar_context_init(&ohci->ar_request_ctx, ohci,
OHCI1394_AsReqRcvContextControlSet);
@@ -2441,9 +2453,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
if (err < 0)
goto fail_self_id;
- ohci->version = reg_read(ohci, OHCI1394_Version) & 0x00ff00ff;
fw_notify("Added fw-ohci device %s, OHCI version %x.%x\n",
- dev->dev.bus_id, ohci->version >> 16, ohci->version & 0xff);
+ dev->dev.bus_id, version >> 16, version & 0xff);
return 0;
fail_self_id: