--- /dev/null
+This page describes how to make calls to the firmware api.
+
+How to call
+===========
+
+The preferred calling convention is known as the firmware mailbox. The
+mailboxes are basically a fixed length array that serves as the call-stack.
+
+Firmware mailboxes can be located by searching the encoder and decoder memory
+for a 16 byte signature. That signature will be located on a 256-byte boundary.
+
+Signature:
+0x78, 0x56, 0x34, 0x12, 0x12, 0x78, 0x56, 0x34,
+0x34, 0x12, 0x78, 0x56, 0x56, 0x34, 0x12, 0x78
+
+The firmware implements 20 mailboxes of 20 32-bit words. The first 10 are
+reserved for API calls. The second 10 are used by the firmware for event
+notification.
+
+ Index Name
+ ----- ----
+ 0 Flags
+ 1 Command
+ 2 Return value
+ 3 Timeout
+ 4-19 Parameter/Result
+
+
+The flags are defined in the following table. The direction is from the
+perspective of the firmware.
+
+ Bit Direction Purpose
+ --- --------- -------
+ 2 O Firmware has processed the command.
+ 1 I Driver has finished setting the parameters.
+ 0 I Driver is using this mailbox.
+
+
+The command is a 32-bit enumerator. The API specifics may be found in the
+fw-*-api.txt documents.
+
+The return value is a 32-bit enumerator. Only two values are currently defined:
+0=success and -1=command undefined.
+
+There are 16 parameters/results 32-bit fields. The driver populates these fields
+with values for all the parameters required by the call. The driver overwrites
+these fields with result values returned by the call. The API specifics may be
+found in the fw-*-api.txt documents.
+
+The timeout value protects the card from a hung driver thread. If the driver
+doesn't handle the completed call within the timeout specified, the firmware
+will reset that mailbox.
+
+To make an API call, the driver iterates over each mailbox looking for the
+first one available (bit 0 has been cleared). The driver sets that bit, fills
+in the command enumerator, the timeout value and any required parameters. The
+driver then sets the parameter ready bit (bit 1). The firmware scans the
+mailboxes for pending commands, processes them, sets the result code, populates
+the result value array with that call's return values and sets the call
+complete bit (bit 2). Once bit 2 is set, the driver should retrieve the results
+and clear all the flags. If the driver does not perform this task within the
+time set in the timeout register, the firmware will reset that mailbox.
+
+Event notifications are sent from the firmware to the host. The host tells the
+firmware which events it is interested in via an API call. That call tells the
+firmware which notification mailbox to use. The firmware signals the host via
+an interrupt. Only the 16 Results fields are used, the Flags, Command, Return
+value and Timeout words are not used.
+
--- /dev/null
+Decoder firmware API description
+================================
+
+Note: this API is part of the decoder firmware, so it's cx23415 only.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_PING_FW
+Enum 0/0x00
+Description
+ This API call does nothing. It may be used to check if the firmware
+ is responding.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_START_PLAYBACK
+Enum 1/0x01
+Description
+ Begin or resume playback.
+Param[0]
+ 0 based frame number in GOP to begin playback from.
+Param[1]
+ Specifies the number of muted audio frames to play before normal
+ audio resumes.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_STOP_PLAYBACK
+Enum 2/0x02
+Description
+ Ends playback and clears all decoder buffers. If PTS is not zero,
+ playback stops at specified PTS.
+Param[0]
+ Display 0=last frame, 1=black
+Param[1]
+ PTS low
+Param[2]
+ PTS high
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_PLAYBACK_SPEED
+Enum 3/0x03
+Description
+ Playback stream at speed other than normal. There are two modes of
+ operation:
+ Smooth: host transfers entire stream and firmware drops unused
+ frames.
+ Coarse: host drops frames based on indexing as required to achieve
+ desired speed.
+Param[0]
+ Bitmap:
+ 0:7 0 normal
+ 1 fast only "1.5 times"
+ n nX fast, 1/nX slow
+ 30 Framedrop:
+ '0' during 1.5 times play, every other B frame is dropped
+ '1' during 1.5 times play, stream is unchanged (bitrate
+ must not exceed 8mbps)
+ 31 Speed:
+ '0' slow
+ '1' fast
+Param[1]
+ Direction: 0=forward, 1=reverse
+Param[2]
+ Picture mask:
+ 1=I frames
+ 3=I, P frames
+ 7=I, P, B frames
+Param[3]
+ B frames per GOP (for reverse play only)
+Param[4]
+ Mute audio: 0=disable, 1=enable
+Param[5]
+ Display 0=frame, 1=field
+Param[6]
+ Specifies the number of muted audio frames to play before normal audio
+ resumes.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_STEP_VIDEO
+Enum 5/0x05
+Description
+ Each call to this API steps the playback to the next unit defined below
+ in the current playback direction.
+Param[0]
+ 0=frame, 1=top field, 2=bottom field
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_DMA_BLOCK_SIZE
+Enum 8/0x08
+Description
+ Set DMA transfer block size. Counterpart to API 0xC9
+Param[0]
+ DMA transfer block size in bytes. A different size may be specified
+ when issuing the DMA transfer command.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_GET_XFER_INFO
+Enum 9/0x09
+Description
+ This API call may be used to detect an end of stream condtion.
+Result[0]
+ Stream type
+Result[1]
+ Address offset
+Result[2]
+ Maximum bytes to transfer
+Result[3]
+ Buffer fullness
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_GET_DMA_STATUS
+Enum 10/0x0A
+Description
+ Status of the last DMA transfer
+Result[0]
+ Bit 1 set means transfer complete
+ Bit 2 set means DMA error
+ Bit 3 set means linked list error
+Result[1]
+ DMA type: 0=MPEG, 1=OSD, 2=YUV
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SCHED_DMA_FROM_HOST
+Enum 11/0x0B
+Description
+ Setup DMA from host operation. Counterpart to API 0xCC
+Param[0]
+ Memory address of link list
+Param[1]
+ Total # of bytes to transfer
+Param[2]
+ DMA type (0=MPEG, 1=OSD, 2=YUV)
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_PAUSE_PLAYBACK
+Enum 13/0x0D
+Description
+ Freeze playback immediately. In this mode, when internal buffers are
+ full, no more data will be accepted and data request IRQs will be
+ masked.
+Param[0]
+ Display: 0=last frame, 1=black
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_HALT_FW
+Enum 14/0x0E
+Description
+ The firmware is halted and no further API calls are serviced until
+ the firmware is uploaded again.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_STANDARD
+Enum 16/0x10
+Description
+ Selects display standard
+Param[0]
+ 0=NTSC, 1=PAL
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_GET_VERSION
+Enum 17/0x11
+Description
+ Returns decoder firmware version information
+Result[0]
+ Version bitmask:
+ Bits 0:15 build
+ Bits 16:23 minor
+ Bits 24:31 major
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_STREAM_INPUT
+Enum 20/0x14
+Description
+ Select decoder stream input port
+Param[0]
+ 0=memory (default), 1=streaming
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_GET_TIMING_INFO
+Enum 21/0x15
+Description
+ Returns timing information from start of playback
+Result[0]
+ Frame count by decode order
+Result[1]
+ Video PTS bits 0:31 by display order
+Result[2]
+ Video PTS bit 32 by display order
+Result[3]
+ SCR bits 0:31 by display order
+Result[4]
+ SCR bit 32 by display order
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_AUDIO_MODE
+Enum 22/0x16
+Description
+ Select audio mode
+Param[0]
+ Dual mono mode action
+Param[1]
+ Stereo mode action:
+ 0=Stereo, 1=Left, 2=Right, 3=Mono, 4=Swap, -1=Unchanged
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_EVENT_NOTIFICATION
+Enum 23/0x17
+Description
+ Setup firmware to notify the host about a particular event.
+ Counterpart to API 0xD5
+Param[0]
+ Event: 0=Audio mode change between stereo and dual channel
+Param[1]
+ Notification 0=disabled, 1=enabled
+Param[2]
+ Interrupt bit
+Param[3]
+ Mailbox slot, -1 if no mailbox required.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_DISPLAY_BUFFERS
+Enum 24/0x18
+Description
+ Number of display buffers. To decode all frames in reverse playback you
+ must use nine buffers.
+Param[0]
+ 0=six buffers, 1=nine buffers
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_EXTRACT_VBI
+Enum 25/0x19
+Description
+ Extracts VBI data
+Param[0]
+ 0=extract from extension & user data, 1=extract from private packets
+Result[0]
+ VBI table location
+Result[1]
+ VBI table size
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_DECODER_SOURCE
+Enum 26/0x1A
+Description
+ Selects decoder source. Ensure that the parameters passed to this
+ API match the encoder settings.
+Param[0]
+ Mode: 0=MPEG from host, 1=YUV from encoder, 2=YUV from host
+Param[1]
+ YUV picture width
+Param[2]
+ YUV picture height
+Param[3]
+ Bitmap: see Param[0] of API 0xBD
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_AUDIO_OUTPUT
+Enum 27/0x1B
+Description
+ Select audio output format
+Param[0]
+ Bitmask:
+ 0:1 Data size:
+ '00' 16 bit
+ '01' 20 bit
+ '10' 24 bit
+ 2:7 Unused
+ 8:9 Mode:
+ '00' 2 channels
+ '01' 4 channels
+ '10' 6 channels
+ '11' 6 channels with one line data mode
+ (for left justified MSB first mode, 20 bit only)
+ 10:11 Unused
+ 12:13 Channel format:
+ '00' right justified MSB first mode
+ '01' left justified MSB first mode
+ '10' I2S mode
+ 14:15 Unused
+ 16:21 Right justify bit count
+ 22:31 Unused
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_AV_DELAY
+Enum 28/0x1C
+Description
+ Set audio/video delay in 90Khz ticks
+Param[0]
+ 0=A/V in sync, negative=audio lags, positive=video lags
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_DEC_SET_PREBUFFERING
+Enum 30/0x1E
+Description
+ Decoder prebuffering, when enabled up to 128KB are buffered for
+ streams <8mpbs or 640KB for streams >8mbps
+Param[0]
+ 0=off, 1=on
--- /dev/null
+This page describes the structures and procedures used by the cx2341x DMA
+engine.
+
+Introduction
+============
+
+The cx2341x PCI interface is busmaster capable. This means it has a DMA
+engine to efficiently transfer large volumes of data between the card and main
+memory without requiring help from a CPU. Like most hardware, it must operate
+on contiguous physical memory. This is difficult to come by in large quantities
+on virtual memory machines.
+
+Therefore, it also supports a technique called "scatter-gather". The card can
+transfer multiple buffers in one operation. Instead of allocating one large
+contiguous buffer, the driver can allocate several smaller buffers.
+
+In practice, I've seen the average transfer to be roughly 80K, but transfers
+above 128K were not uncommon, particularly at startup. The 128K figure is
+important, because that is the largest block that the kernel can normally
+allocate. Even still, 128K blocks are hard to come by, so the driver writer is
+urged to choose a smaller block size and learn the scatter-gather technique.
+
+Mailbox #10 is reserved for DMA transfer information.
+
+Flow
+====
+
+This section describes, in general, the order of events when handling DMA
+transfers. Detailed information follows this section.
+
+- The card raises the Encoder interrupt.
+- The driver reads the transfer type, offset and size from Mailbox #10.
+- The driver constructs the scatter-gather array from enough free dma buffers
+ to cover the size.
+- The driver schedules the DMA transfer via the ScheduleDMAtoHost API call.
+- The card raises the DMA Complete interrupt.
+- The driver checks the DMA status register for any errors.
+- The driver post-processes the newly transferred buffers.
+
+NOTE! It is possible that the Encoder and DMA Complete interrupts get raised
+simultaneously. (End of the last, start of the next, etc.)
+
+Mailbox #10
+===========
+
+The Flags, Command, Return Value and Timeout fields are ignored.
+
+Name: Mailbox #10
+Results[0]: Type: 0: MPEG.
+Results[1]: Offset: The position relative to the card's memory space.
+Results[2]: Size: The exact number of bytes to transfer.
+
+My speculation is that since the StartCapture API has a capture type of "RAW"
+available, that the type field will have other values that correspond to YUV
+and PCM data.
+
+Scatter-Gather Array
+====================
+
+The scatter-gather array is a contiguously allocated block of memory that
+tells the card the source and destination of each data-block to transfer.
+Card "addresses" are derived from the offset supplied by Mailbox #10. Host
+addresses are the physical memory location of the target DMA buffer.
+
+Each S-G array element is a struct of three 32-bit words. The first word is
+the source address, the second is the destination address. Both take up the
+entire 32 bits. The lowest 16 bits of the third word is the transfer byte
+count. The high-bit of the third word is the "last" flag. The last-flag tells
+the card to raise the DMA_DONE interrupt. From hard personal experience, if
+you forget to set this bit, the card will still "work" but the stream will
+most likely get corrupted.
+
+The transfer count must be a multiple of 256. Therefore, the driver will need
+to track how much data in the target buffer is valid and deal with it
+accordingly.
+
+Array Element:
+
+- 32-bit Source Address
+- 32-bit Destination Address
+- 16-bit reserved (high bit is the last flag)
+- 16-bit byte count
+
+DMA Transfer Status
+===================
+
+Register 0x0004 holds the DMA Transfer Status:
+
+Bit
+4 Scatter-Gather array error
+3 DMA write error
+2 DMA read error
+1 write completed
+0 read completed
--- /dev/null
+Encoder firmware API description
+================================
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_PING_FW
+Enum 128/0x80
+Description
+ Does nothing. Can be used to check if the firmware is responding.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_START_CAPTURE
+Enum 129/0x81
+Description
+ Commences the capture of video, audio and/or VBI data. All encoding
+ parameters must be initialized prior to this API call. Captures frames
+ continuously or until a predefined number of frames have been captured.
+Param[0]
+ Capture stream type:
+ 0=MPEG
+ 1=Raw
+ 2=Raw passthrough
+ 3=VBI
+
+Param[1]
+ Bitmask:
+ Bit 0 when set, captures YUV
+ Bit 1 when set, captures PCM audio
+ Bit 2 when set, captures VBI (same as param[0]=3)
+ Bit 3 when set, the capture destination is the decoder
+ (same as param[0]=2)
+ Bit 4 when set, the capture destination is the host
+ Note: this parameter is only meaningful for RAW capture type.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_STOP_CAPTURE
+Enum 130/0x82
+Description
+ Ends a capture in progress
+Param[0]
+ 0=stop at end of GOP (generates IRQ)
+ 1=stop immediate (no IRQ)
+Param[1]
+ Stream type to stop, see param[0] of API 0x81
+Param[2]
+ Subtype, see param[1] of API 0x81
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_AUDIO_ID
+Enum 137/0x89
+Description
+ Assigns the transport stream ID of the encoded audio stream
+Param[0]
+ Audio Stream ID
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_VIDEO_ID
+Enum 139/0x8B
+Description
+ Set video transport stream ID
+Param[0]
+ Video stream ID
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_PCR_ID
+Enum 141/0x8D
+Description
+ Assigns the transport stream ID for PCR packets
+Param[0]
+ PCR Stream ID
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_FRAME_RATE
+Enum 143/0x8F
+Description
+ Set video frames per second. Change occurs at start of new GOP.
+Param[0]
+ 0=30fps
+ 1=25fps
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_FRAME_SIZE
+Enum 145/0x91
+Description
+ Select video stream encoding resolution.
+Param[0]
+ Height in lines. Default 480
+Param[1]
+ Width in pixels. Default 720
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_BIT_RATE
+Enum 149/0x95
+Description
+ Assign average video stream bitrate.
+Param[0]
+ 0=variable bitrate, 1=constant bitrate
+Param[1]
+ bitrate in bits per second
+Param[2]
+ peak bitrate in bits per second, divided by 400
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_GOP_PROPERTIES
+Enum 151/0x97
+Description
+ Setup the GOP structure
+Param[0]
+ GOP size
+Param[1]
+ Number of B frames between the I and P frame, plus 1.
+ For example: IBBPBBPBBPBB --> GOP size: 12, number of B frames: 2+1 = 3
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_ASPECT_RATIO
+Enum 153/0x99
+Description
+ Sets the encoding aspect ratio. Changes in the aspect ratio take effect
+ at the start of the next GOP.
+Param[0]
+ '0000' forbidden
+ '0001' 1:1 square
+ '0010' 4:3
+ '0011' 16:9
+ '0100' 2.21:1
+ '0101' reserved
+ ....
+ '1111' reserved
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_DNR_FILTER_MODE
+Enum 155/0x9B
+Description
+ Assign Dynamic Noise Reduction operating mode
+Param[0]
+ Bit0: Spatial filter, set=auto, clear=manual
+ Bit1: Temporal filter, set=auto, clear=manual
+Param[1]
+ Median filter:
+ 0=Disabled
+ 1=Horizontal
+ 2=Vertical
+ 3=Horiz/Vert
+ 4=Diagonal
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_DNR_FILTER_PROPS
+Enum 157/0x9D
+Description
+ These Dynamic Noise Reduction filter values are only meaningful when
+ the respective filter is set to "manual" (See API 0x9B)
+Param[0]
+ Spatial filter: default 0, range 0:15
+Param[1]
+ Temporal filter: default 0, range 0:31
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_CORING_LEVELS
+Enum 159/0x9F
+Description
+ Assign Dynamic Noise Reduction median filter properties.
+Param[0]
+ Threshold above which the luminance median filter is enabled.
+ Default: 0, range 0:255
+Param[1]
+ Threshold below which the luminance median filter is enabled.
+ Default: 255, range 0:255
+Param[2]
+ Threshold above which the chrominance median filter is enabled.
+ Default: 0, range 0:255
+Param[3]
+ Threshold below which the chrominance median filter is enabled.
+ Default: 255, range 0:255
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_SPATIAL_FILTER_TYPE
+Enum 161/0xA1
+Description
+ Assign spatial prefilter parameters
+Param[0]
+ Luminance filter
+ 0=Off
+ 1=1D Horizontal
+ 2=1D Vertical
+ 3=2D H/V Separable (default)
+ 4=2D Symmetric non-separable
+Param[1]
+ Chrominance filter
+ 0=Off
+ 1=1D Horizontal (default)
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_3_2_PULLDOWN
+Enum 177/0xB1
+Description
+ 3:2 pulldown properties
+Param[0]
+ 0=enabled
+ 1=disabled
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_VBI_LINE
+Enum 183/0xB7
+Description
+ Selects VBI line number.
+Param[0]
+ Bits 0:4 line number
+ Bit 31 0=top_field, 1=bottom_field
+ Bits 0:31 all set specifies "all lines"
+Param[1]
+ VBI line information features: 0=disabled, 1=enabled
+Param[2]
+ Slicing: 0=None, 1=Closed Caption
+ Almost certainly not implemented. Set to 0.
+Param[3]
+ Luminance samples in this line.
+ Almost certainly not implemented. Set to 0.
+Param[4]
+ Chrominance samples in this line
+ Almost certainly not implemented. Set to 0.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_STREAM_TYPE
+Enum 185/0xB9
+Description
+ Assign stream type
+Param[0]
+ 0=Program stream
+ 1=Transport stream
+ 2=MPEG1 stream
+ 3=PES A/V stream
+ 5=PES Video stream
+ 7=PES Audio stream
+ 10=DVD stream
+ 11=VCD stream
+ 12=SVCD stream
+ 13=DVD_S1 stream
+ 14=DVD_S2 stream
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_OUTPUT_PORT
+Enum 187/0xBB
+Description
+ Assign stream output port (not recommended you change setting from default)
+Param[0]
+ 0=Memory (default)
+ 1=Streaming
+ 2=Serial
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_AUDIO_PROPERTIES
+Enum 189/0xBD
+Description
+ Set audio stream properties, may be called while encoding is in progress.
+ Note: all bitfields are consistent with ISO11172 documentation except
+ bits 2:3 which ISO docs define as:
+ '11' Layer I
+ '10' Layer II
+ '01' Layer III
+ '00' Undefined
+ This discrepancy may indicate a possible error in the documentation.
+Param[0]
+ Bitmask:
+ 0:1 '00' 44.1Khz
+ '01' 48Khz
+ '10' 32Khz
+ '11' reserved
+
+ 2:3 '01'=Layer I
+ '10'=Layer II
+
+ 4:7 Bitrate:
+ Index | Layer I | Layer II
+ ------+-------------+------------
+ '0000' | free format | free format
+ '0001' | 32 kbit/s | 32 kbit/s
+ '0010' | 64 kbit/s | 48 kbit/s
+ '0011' | 96 kbit/s | 56 kbit/s
+ '0100' | 128 kbit/s | 64 kbit/s
+ '0101' | 160 kbit/s | 80 kbit/s
+ '0110' | 192 kbit/s | 96 kbit/s
+ '0111' | 224 kbit/s | 112 kbit/s
+ '1000' | 256 kbit/s | 128 kbit/s
+ '1001' | 288 kbit/s | 160 kbit/s
+ '1010' | 320 kbit/s | 192 kbit/s
+ '1011' | 352 kbit/s | 224 kbit/s
+ '1100' | 384 kbit/s | 256 kbit/s
+ '1101' | 416 kbit/s | 320 kbit/s
+ '1110' | 448 kbit/s | 384 kbit/s
+ Note: For Layer II, not all combinations of total bitrate
+ and mode are allowed. See ISO11172-3 3-Annex B, Table 3-B.2
+
+ 8:9 '00'=Stereo
+ '01'=JointStereo
+ '10'=Dual
+ '11'=Mono
+
+ 10:11 Mode Extension used in joint_stereo mode.
+ In Layer I and II they indicate which subbands are in
+ intensity_stereo. All other subbands are coded in stereo.
+ '00' subbands 4-31 in intensity_stereo, bound==4
+ '01' subbands 8-31 in intensity_stereo, bound==8
+ '10' subbands 12-31 in intensity_stereo, bound==12
+ '11' subbands 16-31 in intensity_stereo, bound==16
+
+ 12:13 Emphasis:
+ '00' None
+ '01' 50/15uS
+ '10' reserved
+ '11' CCITT J.17
+
+ 14 CRC:
+ '0' off
+ '1' on
+
+ 15 Copyright:
+ '0' off
+ '1' on
+
+ 16 Generation:
+ '0' copy
+ '1' original
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_HALT_FW
+Enum 195/0xC3
+Description
+ The firmware is halted and no further API calls are serviced until the
+ firmware is uploaded again.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_GET_VERSION
+Enum 196/0xC4
+Description
+ Returns the version of the encoder firmware.
+Result[0]
+ Version bitmask:
+ Bits 0:15 build
+ Bits 16:23 minor
+ Bits 24:31 major
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_GOP_CLOSURE
+Enum 197/0xC5
+Description
+ Assigns the GOP open/close property.
+Param[0]
+ 0=Open
+ 1=Closed
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_GET_SEQ_END
+Enum 198/0xC6
+Description
+ Obtains the sequence end code of the encoder's buffer. When a capture
+ is started a number of interrupts are still generated, the last of
+ which will have Result[0] set to 1 and Result[1] will contain the size
+ of the buffer.
+Result[0]
+ State of the transfer (1 if last buffer)
+Result[1]
+ If Result[0] is 1, this contains the size of the last buffer, undefined
+ otherwise.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_PGM_INDEX_INFO
+Enum 199/0xC7
+Description
+ Sets the Program Index Information.
+Param[0]
+ Picture Mask:
+ 0=No index capture
+ 1=I frames
+ 3=I,P frames
+ 7=I,P,B frames
+Param[1]
+ Elements requested (up to 400)
+Result[0]
+ Offset in SDF memory of the table.
+Result[1]
+ Number of allocated elements up to a maximum of Param[1]
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_VBI_CONFIG
+Enum 200/0xC8
+Description
+ Configure VBI settings
+Param[0]
+ Bitmap:
+ 0 Mode '0' Sliced, '1' Raw
+ 1:3 Insertion:
+ '000' insert in extension & user data
+ '001' insert in private packets
+ '010' separate stream and user data
+ '111' separate stream and private data
+ 8:15 Stream ID (normally 0xBD)
+Param[1]
+ Frames per interrupt (max 8). Only valid in raw mode.
+Param[2]
+ Total raw VBI frames. Only valid in raw mode.
+Param[3]
+ Start codes
+Param[4]
+ Stop codes
+Param[5]
+ Lines per frame
+Param[6]
+ Byte per line
+Result[0]
+ Observed frames per interrupt in raw mode only. Rage 1 to Param[1]
+Result[1]
+ Observed number of frames in raw mode. Range 1 to Param[2]
+Result[2]
+ Memory offset to start or raw VBI data
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_DMA_BLOCK_SIZE
+Enum 201/0xC9
+Description
+ Set DMA transfer block size
+Param[0]
+ DMA transfer block size in bytes or frames. When unit is bytes,
+ supported block sizes are 2^7, 2^8 and 2^9 bytes.
+Param[1]
+ Unit: 0=bytes, 1=frames
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_GET_PREV_DMA_INFO_MB_10
+Enum 202/0xCA
+Description
+ Returns information on the previous DMA transfer in conjunction with
+ bit 27 of the interrupt mask. Uses mailbox 10.
+Result[0]
+ Type of stream
+Result[1]
+ Address Offset
+Result[2]
+ Maximum size of transfer
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_GET_PREV_DMA_INFO_MB_9
+Enum 203/0xCB
+Description
+ Returns information on the previous DMA transfer in conjunction with
+ bit 27 of the interrupt mask. Uses mailbox 9.
+Result[0]
+ Status bits:
+ Bit 0 set indicates transfer complete
+ Bit 2 set indicates transfer error
+ Bit 4 set indicates linked list error
+Result[1]
+ DMA type
+Result[2]
+ Presentation Time Stamp bits 0..31
+Result[3]
+ Presentation Time Stamp bit 32
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SCHED_DMA_TO_HOST
+Enum 204/0xCC
+Description
+ Setup DMA to host operation
+Param[0]
+ Memory address of link list
+Param[1]
+ Length of link list (wtf: what units ???)
+Param[2]
+ DMA type (0=MPEG)
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_INITIALIZE_INPUT
+Enum 205/0xCD
+Description
+ Initializes the video input
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_FRAME_DROP_RATE
+Enum 208/0xD0
+Description
+ For each frame captured, skip specified number of frames.
+Param[0]
+ Number of frames to skip
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_PAUSE_ENCODER
+Enum 210/0xD2
+Description
+ During a pause condition, all frames are dropped instead of being encoded.
+Param[0]
+ 0=Pause encoding
+ 1=Continue encoding
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_REFRESH_INPUT
+Enum 211/0xD3
+Description
+ Refreshes the video input
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_COPYRIGHT
+Enum 212/0xD4
+Description
+ Sets stream copyright property
+Param[0]
+ 0=Stream is not copyrighted
+ 1=Stream is copyrighted
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_EVENT_NOTIFICATION
+Enum 213/0xD5
+Description
+ Setup firmware to notify the host about a particular event. Host must
+ unmask the interrupt bit.
+Param[0]
+ Event (0=refresh encoder input)
+Param[1]
+ Notification 0=disabled 1=enabled
+Param[2]
+ Interrupt bit
+Param[3]
+ Mailbox slot, -1 if no mailbox required.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_NUM_VSYNC_LINES
+Enum 214/0xD6
+Description
+ Depending on the analog video decoder used, this assigns the number
+ of lines for field 1 and 2.
+Param[0]
+ Field 1 number of lines:
+ 0x00EF for SAA7114
+ 0x00F0 for SAA7115
+ 0x0105 for Micronas
+Param[1]
+ Field 2 number of lines:
+ 0x00EF for SAA7114
+ 0x00F0 for SAA7115
+ 0x0106 for Micronas
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_SET_PLACEHOLDER
+Enum 215/0xD7
+Description
+ Provides a mechanism of inserting custom user data in the MPEG stream.
+Param[0]
+ 0=extension & user data
+ 1=private packet with stream ID 0xBD
+Param[1]
+ Rate at which to insert data, in units of frames (for private packet)
+ or GOPs (for ext. & user data)
+Param[2]
+ Number of data DWORDs (below) to insert
+Param[3]
+ Custom data 0
+Param[4]
+ Custom data 1
+Param[5]
+ Custom data 2
+Param[6]
+ Custom data 3
+Param[7]
+ Custom data 4
+Param[8]
+ Custom data 5
+Param[9]
+ Custom data 6
+Param[10]
+ Custom data 7
+Param[11]
+ Custom data 8
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_MUTE_VIDEO
+Enum 217/0xD9
+Description
+ Video muting
+Param[0]
+ Bit usage:
+ 0 '0'=video not muted
+ '1'=video muted, creates frames with the YUV color defined below
+ 1:7 Unused
+ 8:15 V chrominance information
+ 16:23 U chrominance information
+ 24:31 Y luminance information
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_MUTE_AUDIO
+Enum 218/0xDA
+Description
+ Audio muting
+Param[0]
+ 0=audio not muted
+ 1=audio muted (produces silent mpeg audio stream)
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_UNKNOWN
+Enum 219/0xDB
+Description
+ Unknown API, it's used by Hauppauge though.
+Param[0]
+ 0 This is the value Hauppauge uses, Unknown what it means.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_ENC_MISC
+Enum 220/0xDC
+Description
+ Miscellaneous actions. Not known for 100% what it does. It's really a
+ sort of ioctl call. The first parameter is a command number, the second
+ the value.
+Param[0]
+ Command number:
+ 1=set initial SCR value when starting encoding.
+ 2=set quality mode (apparently some test setting).
+ 3=setup advanced VIM protection handling (supposedly only for the cx23416
+ for raw YUV).
+ Actually it looks like this should be 0 for saa7114/5 based card and 1
+ for cx25840 based cards.
+ 4=generate artificial PTS timestamps
+ 5=USB flush mode
+ 6=something to do with the quantization matrix
+ 7=set navigation pack insertion for DVD
+ 8=enable scene change detection (seems to be a failure)
+ 9=set history parameters of the video input module
+ 10=set input field order of VIM
+ 11=set quantization matrix
+ 12=reset audio interface
+ 13=set audio volume delay
+ 14=set audio delay
+
+Param[1]
+ Command value.
--- /dev/null
+This document describes the cx2341x memory map and documents some of the register
+space.
+
+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
+commands like:
+
+ ivtvctl -O min=0x02000000,max=0x020000ff
+
+So take this as is, I'm always searching for more stuff, it's a large
+register space :-).
+
+Memory Map
+==========
+
+The cx2341x exposes its entire 64M memory space to the PCI host via the PCI BAR0
+(Base Address Register 0). The addresses here are offsets relative to the
+address held in BAR0.
+
+0x00000000-0x00ffffff Encoder memory space
+0x00000000-0x0003ffff Encode.rom
+ ???-??? MPEG buffer(s)
+ ???-??? Raw video capture buffer(s)
+ ???-??? Raw audio capture buffer(s)
+ ???-??? Display buffers (6 or 9)
+
+0x01000000-0x01ffffff Decoder memory space
+0x01000000-0x0103ffff Decode.rom
+ ???-??? MPEG buffers(s)
+0x0114b000-0x0115afff Audio.rom (deprecated?)
+
+0x02000000-0x0200ffff Register Space
+
+Registers
+=========
+
+The registers occupy the 64k space starting at the 0x02000000 offset from BAR0.
+All of these registers are 32 bits wide.
+
+DMA Registers 0x000-0xff:
+
+ 0x00 - Control:
+ 0=reset/cancel, 1=read, 2=write, 4=stop
+ 0x04 - DMA status:
+ 1=read busy, 2=write busy, 4=read error, 8=write error, 16=link list error
+ 0x08 - pci DMA pointer for read link list
+ 0x0c - pci DMA pointer for write link list
+ 0x10 - read/write DMA enable:
+ 1=read enable, 2=write enable
+ 0x14 - always 0xffffffff, if set any lower instability occurs, 0x00 crashes
+ 0x18 - ??
+ 0x1c - always 0x20 or 32, smaller values slow down DMA transactions
+ 0x20 - always value of 0x780a010a
+ 0x24-0x3c - usually just random values???
+ 0x40 - Interrupt status
+ 0x44 - Write a bit here and shows up in Interrupt status 0x40
+ 0x48 - Interrupt Mask
+ 0x4C - always value of 0xfffdffff,
+ 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
+ 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
+ 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
+ 0xe4 - first (and only) read linked list reg, for Decoder memory addr
+ 0xe8 - first (and only) read linked list reg, for length of buffer
+ 0xec-0xff - Nothing seems to be in these registers, 0xec-f4 are 0x00000000.
+
+Memory locations for Encoder Buffers 0x700-0x7ff:
+
+These registers show offsets of memory locations pertaining to each
+buffer area used for encoding, have to shift them by <<1 first.
+
+0x07F8: Encoder SDRAM refresh
+0x07FC: Encoder SDRAM pre-charge
+
+Memory locations for Decoder Buffers 0x800-0x8ff:
+
+These registers show offsets of memory locations pertaining to each
+buffer area used for decoding, have to shift them by <<1 first.
+
+0x08F8: Decoder SDRAM refresh
+0x08FC: Decoder SDRAM pre-charge
+
+Other memory locations:
+
+0x2800: Video Display Module control
+0x2D00: AO (audio output?) control
+0x2D24: Bytes Flushed
+0x7000: LSB I2C write clock bit (inverted)
+0x7004: LSB I2C write data bit (inverted)
+0x7008: LSB I2C read clock bit
+0x700c: LSB I2C read data bit
+0x9008: GPIO get input state
+0x900c: GPIO set output state
+0x9020: GPIO direction (Bit7 (GPIO 0..7) - 0:input, 1:output)
+0x9050: SPU control
+0x9054: Reset HW blocks
+0x9058: VPU control
+0xA018: Bit6: interrupt pending?
+0xA064: APU command
+
+
+Interrupt Status Register
+=========================
+
+The definition of the bits in the interrupt status register 0x0040, and the
+interrupt mask 0x0048. If a bit is cleared in the mask, then we want our ISR to
+execute.
+
+Bit
+31 Encoder Start Capture
+30 Encoder EOS
+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
+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)
+
+Missing
+Encoder API call completed
+Decoder API call completed
+Encoder API post(?)
+Decoder API post(?)
+Decoder VTRACE event
--- /dev/null
+OSD firmware API description
+============================
+
+Note: this API is part of the decoder firmware, so it's cx23415 only.
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_FRAMEBUFFER
+Enum 65/0x41
+Description
+ Return base and length of contiguous OSD memory.
+Result[0]
+ OSD base address
+Result[1]
+ OSD length
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_PIXEL_FORMAT
+Enum 66/0x42
+Description
+ Query OSD format
+Result[0]
+ 0=8bit index, 4=AlphaRGB 8:8:8:8
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_PIXEL_FORMAT
+Enum 67/0x43
+Description
+ Assign pixel format
+Param[0]
+ 0=8bit index, 4=AlphaRGB 8:8:8:8
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_STATE
+Enum 68/0x44
+Description
+ Query OSD state
+Result[0]
+ Bit 0 0=off, 1=on
+ Bits 1:2 alpha control
+ Bits 3:5 pixel format
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_STATE
+Enum 69/0x45
+Description
+ OSD switch
+Param[0]
+ 0=off, 1=on
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_OSD_COORDS
+Enum 70/0x46
+Description
+ Retrieve coordinates of OSD area blended with video
+Result[0]
+ OSD buffer address
+Result[1]
+ Stride in pixels
+Result[2]
+ Lines in OSD buffer
+Result[3]
+ Horizontal offset in buffer
+Result[4]
+ Vertical offset in buffer
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_OSD_COORDS
+Enum 71/0x47
+Description
+ Assign the coordinates of the OSD area to blend with video
+Param[0]
+ buffer address
+Param[1]
+ buffer stride in pixels
+Param[2]
+ lines in buffer
+Param[3]
+ horizontal offset
+Param[4]
+ vertical offset
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_SCREEN_COORDS
+Enum 72/0x48
+Description
+ Retrieve OSD screen area coordinates
+Result[0]
+ top left horizontal offset
+Result[1]
+ top left vertical offset
+Result[2]
+ bottom right hotizontal offset
+Result[3]
+ bottom right vertical offset
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_SCREEN_COORDS
+Enum 73/0x49
+Description
+ Assign the coordinates of the screen area to blend with video
+Param[0]
+ top left horizontal offset
+Param[1]
+ top left vertical offset
+Param[2]
+ bottom left horizontal offset
+Param[3]
+ bottom left vertical offset
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_GLOBAL_ALPHA
+Enum 74/0x4A
+Description
+ Retrieve OSD global alpha
+Result[0]
+ global alpha: 0=off, 1=on
+Result[1]
+ bits 0:7 global alpha
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_GLOBAL_ALPHA
+Enum 75/0x4B
+Description
+ Update global alpha
+Param[0]
+ global alpha: 0=off, 1=on
+Param[1]
+ global alpha (8 bits)
+Param[2]
+ local alpha: 0=on, 1=off
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_BLEND_COORDS
+Enum 78/0x4C
+Description
+ Move start of blending area within display buffer
+Param[0]
+ horizontal offset in buffer
+Param[1]
+ vertical offset in buffer
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_FLICKER_STATE
+Enum 79/0x4F
+Description
+ Retrieve flicker reduction module state
+Result[0]
+ flicker state: 0=off, 1=on
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_FLICKER_STATE
+Enum 80/0x50
+Description
+ Set flicker reduction module state
+Param[0]
+ State: 0=off, 1=on
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_BLT_COPY
+Enum 82/0x52
+Description
+ BLT copy
+Param[0]
+'0000' zero
+'0001' ~destination AND ~source
+'0010' ~destination AND source
+'0011' ~destination
+'0100' destination AND ~source
+'0101' ~source
+'0110' destination XOR source
+'0111' ~destination OR ~source
+'1000' ~destination AND ~source
+'1001' destination XNOR source
+'1010' source
+'1011' ~destination OR source
+'1100' destination
+'1101' destination OR ~source
+'1110' destination OR source
+'1111' one
+
+Param[1]
+ Resulting alpha blending
+ '01' source_alpha
+ '10' destination_alpha
+ '11' source_alpha*destination_alpha+1
+ (zero if both source and destination alpha are zero)
+Param[2]
+ '00' output_pixel = source_pixel
+
+ '01' if source_alpha=0:
+ output_pixel = destination_pixel
+ if 256 > source_alpha > 1:
+ output_pixel = ((source_alpha + 1)*source_pixel +
+ (255 - source_alpha)*destination_pixel)/256
+
+ '10' if destination_alpha=0:
+ output_pixel = source_pixel
+ if 255 > destination_alpha > 0:
+ output_pixel = ((255 - destination_alpha)*source_pixel +
+ (destination_alpha + 1)*destination_pixel)/256
+
+ '11' if source_alpha=0:
+ source_temp = 0
+ if source_alpha=255:
+ source_temp = source_pixel*256
+ if 255 > source_alpha > 0:
+ source_temp = source_pixel*(source_alpha + 1)
+ if destination_alpha=0:
+ destination_temp = 0
+ if destination_alpha=255:
+ destination_temp = destination_pixel*256
+ if 255 > destination_alpha > 0:
+ destination_temp = destination_pixel*(destination_alpha + 1)
+ output_pixel = (source_temp + destination_temp)/256
+Param[3]
+ width
+Param[4]
+ height
+Param[5]
+ destination pixel mask
+Param[6]
+ destination rectangle start address
+Param[7]
+ destination stride in dwords
+Param[8]
+ source stride in dwords
+Param[9]
+ source rectangle start address
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_BLT_FILL
+Enum 83/0x53
+Description
+ BLT fill color
+Param[0]
+ Same as Param[0] on API 0x52
+Param[1]
+ Same as Param[1] on API 0x52
+Param[2]
+ Same as Param[2] on API 0x52
+Param[3]
+ width
+Param[4]
+ height
+Param[5]
+ destination pixel mask
+Param[6]
+ destination rectangle start address
+Param[7]
+ destination stride in dwords
+Param[8]
+ color fill value
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_BLT_TEXT
+Enum 84/0x54
+Description
+ BLT for 8 bit alpha text source
+Param[0]
+ Same as Param[0] on API 0x52
+Param[1]
+ Same as Param[1] on API 0x52
+Param[2]
+ Same as Param[2] on API 0x52
+Param[3]
+ width
+Param[4]
+ height
+Param[5]
+ destination pixel mask
+Param[6]
+ destination rectangle start address
+Param[7]
+ destination stride in dwords
+Param[8]
+ source stride in dwords
+Param[9]
+ source rectangle start address
+Param[10]
+ color fill value
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_FRAMEBUFFER_WINDOW
+Enum 86/0x56
+Description
+ Positions the main output window on the screen. The coordinates must be
+ such that the entire window fits on the screen.
+Param[0]
+ window width
+Param[1]
+ window height
+Param[2]
+ top left window corner horizontal offset
+Param[3]
+ top left window corner vertical offset
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_CHROMA_KEY
+Enum 96/0x60
+Description
+ Chroma key switch and color
+Param[0]
+ state: 0=off, 1=on
+Param[1]
+ color
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_GET_ALPHA_CONTENT_INDEX
+Enum 97/0x61
+Description
+ Retrieve alpha content index
+Result[0]
+ alpha content index, Range 0:15
+
+-------------------------------------------------------------------------------
+
+Name CX2341X_OSD_SET_ALPHA_CONTENT_INDEX
+Enum 98/0x62
+Description
+ Assign alpha content index
+Param[0]
+ alpha content index, range 0:15
--- /dev/null
+This document describes how to upload the cx2341x firmware to the card.
+
+How to find
+===========
+
+See the web pages of the various projects that uses this chip for information
+on how to obtain the firmware.
+
+The firmware stored in a Windows driver can be detected as follows:
+
+- Each firmware image is 256k bytes.
+- The 1st 32-bit word of the Encoder image is 0x0000da7
+- The 1st 32-bit word of the Decoder image is 0x00003a7
+- The 2nd 32-bit word of both images is 0xaa55bb66
+
+How to load
+===========
+
+- Issue the FWapi command to stop the encoder if it is running. Wait for the
+ command to complete.
+- Issue the FWapi command to stop the decoder if it is running. Wait for the
+ command to complete.
+- Issue the I2C command to the digitizer to stop emitting VSYNC events.
+- Issue the FWapi command to halt the encoder's firmware.
+- Sleep for 10ms.
+- Issue the FWapi command to halt the decoder's firmware.
+- Sleep for 10ms.
+- Write 0x00000000 to register 0x2800 to stop the Video Display Module.
+- Write 0x00000005 to register 0x2D00 to stop the AO (audio output?).
+- Write 0x00000000 to register 0xA064 to ping? the APU.
+- Write 0xFFFFFFFE to register 0x9058 to stop the VPU.
+- Write 0xFFFFFFFF to register 0x9054 to reset the HW blocks.
+- Write 0x00000001 to register 0x9050 to stop the SPU.
+- Sleep for 10ms.
+- Write 0x0000001A to register 0x07FC to init the Encoder SDRAM's pre-charge.
+- Write 0x80000640 to register 0x07F8 to init the Encoder SDRAM's refresh to 1us.
+- Write 0x0000001A to register 0x08FC to init the Decoder SDRAM's pre-charge.
+- Write 0x80000640 to register 0x08F8 to init the Decoder SDRAM's refresh to 1us.
+- Sleep for 512ms. (600ms is recommended)
+- Transfer the encoder's firmware image to offset 0 in Encoder memory space.
+- Transfer the decoder's firmware image to offset 0 in Decoder memory space.
+- Use a read-modify-write operation to Clear bit 0 of register 0x9050 to
+ re-enable the SPU.
+- Sleep for 1 second.
+- Use a read-modify-write operation to Clear bits 3 and 0 of register 0x9058
+ to re-enable the VPU.
+- Sleep for 1 second.
+- Issue status API commands to both firmware images to verify.
+
--- /dev/null
+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 recieved.
+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://users.pandora.be/nenya/electronics/rc5/ 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
+
projects / openwrt / staging / blogic.git / commitdiff