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
if changed to 0xffffffff DMA write interrupts break.
0x50 - always 0xffffffff
0x54 - always 0xffffffff (0x4c, 0x50, 0x54 seem like interrupt masks, are
- 3 processors on chip, Java ones, VPU, SPU, APU, maybe these are the
+ 3 processors on chip, Java ones, VPU, SPU, APU, maybe these are the
interrupt masks???).
0x60-0x7C - random values
0x80 - first write linked list reg, for Encoder Memory addr
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
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)