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| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-calling.txt | 69 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-decoder-api.txt | 319 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-dma.txt | 94 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-encoder-api.txt | 672 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-memory.txt | 141 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-osd-api.txt | 342 | ||||
| -rw-r--r-- | Documentation/video4linux/cx2341x/fw-upload.txt | 49 | ||||
| -rw-r--r-- | Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt | 54 |
8 files changed, 1740 insertions, 0 deletions
diff --git a/Documentation/video4linux/cx2341x/fw-calling.txt b/Documentation/video4linux/cx2341x/fw-calling.txt new file mode 100644 index 00000000000..8d21181de53 --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-calling.txt @@ -0,0 +1,69 @@ +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. + diff --git a/Documentation/video4linux/cx2341x/fw-decoder-api.txt b/Documentation/video4linux/cx2341x/fw-decoder-api.txt new file mode 100644 index 00000000000..59193b6b557 --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-decoder-api.txt @@ -0,0 +1,319 @@ +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 diff --git a/Documentation/video4linux/cx2341x/fw-dma.txt b/Documentation/video4linux/cx2341x/fw-dma.txt new file mode 100644 index 00000000000..8123e262d5b --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-dma.txt @@ -0,0 +1,94 @@ +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 diff --git a/Documentation/video4linux/cx2341x/fw-encoder-api.txt b/Documentation/video4linux/cx2341x/fw-encoder-api.txt new file mode 100644 index 00000000000..64cd111349a --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-encoder-api.txt @@ -0,0 +1,672 @@ +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. diff --git a/Documentation/video4linux/cx2341x/fw-memory.txt b/Documentation/video4linux/cx2341x/fw-memory.txt new file mode 100644 index 00000000000..336d8208ef3 --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-memory.txt @@ -0,0 +1,141 @@ +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 diff --git a/Documentation/video4linux/cx2341x/fw-osd-api.txt b/Documentation/video4linux/cx2341x/fw-osd-api.txt new file mode 100644 index 00000000000..da98ae30a37 --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-osd-api.txt @@ -0,0 +1,342 @@ +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 diff --git a/Documentation/video4linux/cx2341x/fw-upload.txt b/Documentation/video4linux/cx2341x/fw-upload.txt new file mode 100644 index 00000000000..60c502ce321 --- /dev/null +++ b/Documentation/video4linux/cx2341x/fw-upload.txt @@ -0,0 +1,49 @@ +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. + diff --git a/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt b/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt new file mode 100644 index 00000000000..93fec32a118 --- /dev/null +++ b/Documentation/video4linux/cx88/hauppauge-wintv-cx88-ir.txt @@ -0,0 +1,54 @@ +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 + |