summaryrefslogtreecommitdiff
path: root/drivers/firewire/fw-ohci.c
diff options
context:
space:
mode:
authorKristian Høgsberg <krh@redhat.com>2007-03-07 12:12:56 -0500
committerStefan Richter <stefanr@s5r6.in-berlin.de>2007-03-09 22:03:15 +0100
commitd60d7f1d5ce83d1be8d79256f711d6a645b7a2fa (patch)
treedd3f02960657d4270efb0990b5cdfe0eeef62ad5 /drivers/firewire/fw-ohci.c
parent473d28c730e2de888c24b226cfe4183868eacde2 (diff)
firewire: Implement CSR cycle time and bus time registers.
Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'drivers/firewire/fw-ohci.c')
-rw-r--r--drivers/firewire/fw-ohci.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index a9e13468f60..6f9895d201b 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -139,6 +139,7 @@ struct fw_ohci {
int node_id;
int generation;
int request_generation;
+ u32 bus_seconds;
/* Spinlock for accessing fw_ohci data. Never call out of
* this driver with this lock held. */
@@ -959,7 +960,7 @@ static void bus_reset_tasklet(unsigned long data)
static irqreturn_t irq_handler(int irq, void *data)
{
struct fw_ohci *ohci = data;
- u32 event, iso_event;
+ u32 event, iso_event, cycle_time;
int i;
event = reg_read(ohci, OHCI1394_IntEventClear);
@@ -1002,6 +1003,12 @@ static irqreturn_t irq_handler(int irq, void *data)
iso_event &= ~(1 << i);
}
+ if (event & OHCI1394_cycle64Seconds) {
+ cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+ if ((cycle_time & 0x80000000) == 0)
+ ohci->bus_seconds++;
+ }
+
return IRQ_HANDLED;
}
@@ -1213,6 +1220,19 @@ ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
return retval;
}
+static u64
+ohci_get_bus_time(struct fw_card *card)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ u32 cycle_time;
+ u64 bus_time;
+
+ cycle_time = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
+ bus_time = ((u64) ohci->bus_seconds << 32) | cycle_time;
+
+ return bus_time;
+}
+
static int handle_ir_bufferfill_packet(struct context *context,
struct descriptor *d,
struct descriptor *last)
@@ -1686,6 +1706,7 @@ static const struct fw_card_driver ohci_driver = {
.send_response = ohci_send_response,
.cancel_packet = ohci_cancel_packet,
.enable_phys_dma = ohci_enable_phys_dma,
+ .get_bus_time = ohci_get_bus_time,
.allocate_iso_context = ohci_allocate_iso_context,
.free_iso_context = ohci_free_iso_context,
@@ -1862,7 +1883,8 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
OHCI1394_RQPkt | OHCI1394_RSPkt |
OHCI1394_reqTxComplete | OHCI1394_respTxComplete |
OHCI1394_isochRx | OHCI1394_isochTx |
- OHCI1394_masterIntEnable);
+ OHCI1394_masterIntEnable |
+ OHCI1394_cycle64Seconds);
bus_options = reg_read(ohci, OHCI1394_BusOptions);
max_receive = (bus_options >> 12) & 0xf;