diff options
Diffstat (limited to 'Documentation/video4linux/cx2341x/fw-memory.txt')
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-memory.txt | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/Documentation/video4linux/cx2341x/fw-memory.txt b/Documentation/video4linux/cx2341x/fw-memory.txt index ef0aad3f88fc..9d736fe8de66 100644 --- a/Documentation/video4linux/cx2341x/fw-memory.txt +++ b/Documentation/video4linux/cx2341x/fw-memory.txt @@ -1,6 +1,8 @@ This document describes the cx2341x memory map and documents some of the register space. +Note: the memory long words are little-endian ('intel format'). + Warning! This information was figured out from searching through the memory and registers, this information may not be correct and is certainly not complete, and was not derived from anything more than searching through the memory space with @@ -67,7 +69,7 @@ DMA Registers 0x000-0xff: 0x84 - first write linked list reg, for pci memory addr 0x88 - first write linked list reg, for length of buffer in memory addr (|0x80000000 or this for last link) - 0x8c-0xcc - rest of write linked list reg, 8 sets of 3 total, DMA goes here + 0x8c-0xdc - rest of write linked list reg, 8 sets of 3 total, DMA goes here from linked list addr in reg 0x0c, firmware must push through or something. 0xe0 - first (and only) read linked list reg, for pci memory addr @@ -123,12 +125,8 @@ Bit 29 Encoder VBI capture 28 Encoder Video Input Module reset event 27 Encoder DMA complete -26 -25 Decoder copy protect detection event -24 Decoder audio mode change detection event -23 +24 Decoder audio mode change detection event (through event notification) 22 Decoder data request -21 Decoder I-Frame? done 20 Decoder DMA complete 19 Decoder VBI re-insertion 18 Decoder DMA err (linked-list bad) |