diff options
| author | Ira Snyder <iws@ovro.caltech.edu> | 2011-02-11 13:34:29 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2011-05-19 16:55:08 +1000 |
| commit | c186f0e177275e83728d7acfdf4a1b68793a7038 (patch) | |
| tree | 1628c09fc7a4eaae4a4f3b27e5bf77c536990874 /drivers/misc/carma/Kconfig | |
| parent | 41fb5e62604c5ddd00a784ffb7672dd8df5d76f2 (diff) | |
misc: Add CARMA DATA-FPGA Access Driver
This driver allows userspace to access the data processing FPGAs on the
OVRO CARMA board. It has two modes of operation:
1) random access
This allows users to poke any DATA-FPGA registers by using mmap to map
the address region directly into their memory map.
2) correlation dumping
When correlating, the DATA-FPGA's have special requirements for getting
the data out of their memory before the next correlation. This nominally
happens at 64Hz (every 15.625ms). If the data is not dumped before the
next correlation, data is lost.
The data dumping driver handles buffering up to 1 second worth of
correlation data from the FPGAs. This lowers the realtime scheduling
requirements for the userspace process reading the device.
Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/misc/carma/Kconfig')
| -rw-r--r-- | drivers/misc/carma/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/misc/carma/Kconfig b/drivers/misc/carma/Kconfig new file mode 100644 index 00000000000..4be183f7e6f --- /dev/null +++ b/drivers/misc/carma/Kconfig @@ -0,0 +1,9 @@ +config CARMA_FPGA + tristate "CARMA DATA-FPGA Access Driver" + depends on FSL_SOC && PPC_83xx && MEDIA_SUPPORT && HAS_DMA && FSL_DMA + select VIDEOBUF_DMA_SG + default n + help + Say Y here to include support for communicating with the data + processing FPGAs on the OVRO CARMA board. + |