[media] cx88.rst: add contents of hauppauge-wintv-cx88-ir.txt

Import the contents of hauppauge-wintv-cx88-ir.txt, after
converted to ReST into cx88.rst file.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 0 insertions, 54 deletions

diff --git a/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt b/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt
deleted file mode 100644
index f4329a38878e..000000000000
--- a/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt
+++ /dev/null
@@ -1,54 +0,0 @@
-The controls for the mux are GPIO [0,1] for source, and GPIO 2 for muting.
-
-GPIO0  GPIO1
-  0        0    TV Audio
-  1        0    FM radio
-  0        1    Line-In
-  1        1    Mono tuner bypass or CD passthru (tuner specific)
-
-GPIO 16(i believe) is tied to the IR port (if present).
-
-------------------------------------------------------------------------------------
-
->From the data sheet:
- Register 24'h20004  PCI Interrupt Status
-  bit [18]  IR_SMP_INT Set when 32 input samples have been collected over
-  gpio[16] pin into GP_SAMPLE register.
-
-What's missing from the data sheet:
-
-Setup 4KHz sampling rate (roughly 2x oversampled; good enough for our RC5
-compat remote)
-set register 0x35C050 to  0xa80a80
-
-enable sampling
-set register 0x35C054 to 0x5
-
-Of course, enable the IRQ bit 18 in the interrupt mask register .(and
-provide for a handler)
-
-GP_SAMPLE register is at 0x35C058
-
-Bits are then right shifted into the GP_SAMPLE register at the specified
-rate; you get an interrupt when a full DWORD is received.
-You need to recover the actual RC5 bits out of the (oversampled) IR sensor
-bits. (Hint: look for the 0/1and 1/0 crossings of the RC5 bi-phase data)  An
-actual raw RC5 code will span 2-3 DWORDS, depending on the actual alignment.
-
-I'm pretty sure when no IR signal is present the receiver is always in a
-marking state(1); but stray light, etc can cause intermittent noise values
-as well.  Remember, this is a free running sample of the IR receiver state
-over time, so don't assume any sample starts at any particular place.
-
-http://www.atmel.com/dyn/resources/prod_documents/doc2817.pdf
-This data sheet (google search) seems to have a lovely description of the
-RC5 basics
-
-http://www.nenya.be/beor/electronics/rc5.htm  and more data
-
-http://www.ee.washington.edu/circuit_archive/text/ir_decode.txt
-and even a reference to how to decode a bi-phase data stream.
-
-http://www.xs4all.nl/~sbp/knowledge/ir/rc5.htm
-still more info
-