diff options
Diffstat (limited to 'drivers/firewire/ohci.h')
| -rw-r--r-- | drivers/firewire/ohci.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/firewire/ohci.h b/drivers/firewire/ohci.h index c4d005a9901a..d83fd4731d56 100644 --- a/drivers/firewire/ohci.h +++ b/drivers/firewire/ohci.h @@ -156,4 +156,46 @@ #define OHCI1394_phy_tcode 0xe +// Self-ID DMA. + +#define OHCI1394_SelfIDCount_selfIDError_MASK 0x80000000 +#define OHCI1394_SelfIDCount_selfIDError_SHIFT 31 +#define OHCI1394_SelfIDCount_selfIDGeneration_MASK 0x00ff0000 +#define OHCI1394_SelfIDCount_selfIDGeneration_SHIFT 16 +#define OHCI1394_SelfIDCount_selfIDSize_MASK 0x000007fc +#define OHCI1394_SelfIDCount_selfIDSize_SHIFT 2 + +static inline bool ohci1394_self_id_count_is_error(u32 value) +{ + return !!((value & OHCI1394_SelfIDCount_selfIDError_MASK) >> OHCI1394_SelfIDCount_selfIDError_SHIFT); +} + +static inline u8 ohci1394_self_id_count_get_generation(u32 value) +{ + return (value & OHCI1394_SelfIDCount_selfIDGeneration_MASK) >> OHCI1394_SelfIDCount_selfIDGeneration_SHIFT; +} + +// In 1394 OHCI specification, the maximum size of self ID stream is 504 quadlets +// (= 63 devices * 4 self ID packets * 2 quadlets). The selfIDSize field accommodates it and its +// additional first quadlet, since the field is 9 bits (0x1ff = 511). +static inline u32 ohci1394_self_id_count_get_size(u32 value) +{ + return (value & OHCI1394_SelfIDCount_selfIDSize_MASK) >> OHCI1394_SelfIDCount_selfIDSize_SHIFT; +} + +#define OHCI1394_SELF_ID_RECEIVE_Q0_GENERATION_MASK 0x00ff0000 +#define OHCI1394_SELF_ID_RECEIVE_Q0_GENERATION_SHIFT 16 +#define OHCI1394_SELF_ID_RECEIVE_Q0_TIMESTAMP_MASK 0x0000ffff +#define OHCI1394_SELF_ID_RECEIVE_Q0_TIMESTAMP_SHIFT 0 + +static inline u8 ohci1394_self_id_receive_q0_get_generation(u32 quadlet0) +{ + return (quadlet0 & OHCI1394_SELF_ID_RECEIVE_Q0_GENERATION_MASK) >> OHCI1394_SELF_ID_RECEIVE_Q0_GENERATION_SHIFT; +} + +static inline u16 ohci1394_self_id_receive_q0_get_timestamp(u32 quadlet0) +{ + return (quadlet0 & OHCI1394_SELF_ID_RECEIVE_Q0_TIMESTAMP_MASK) >> OHCI1394_SELF_ID_RECEIVE_Q0_TIMESTAMP_SHIFT; +} + #endif /* _FIREWIRE_OHCI_H */ |