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Diffstat (limited to 'Documentation/video4linux/si476x.txt')
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diff --git a/Documentation/video4linux/si476x.txt b/Documentation/video4linux/si476x.txt deleted file mode 100644 index 616607955aaf..000000000000 --- a/Documentation/video4linux/si476x.txt +++ /dev/null @@ -1,187 +0,0 @@ -SI476x Driver Readme ------------------------------------------------- - Copyright (C) 2013 Andrey Smirnov <andrew.smirnov@gmail.com> - -TODO for the driver ------------------------------- - -- According to the SiLabs' datasheet it is possible to update the - firmware of the radio chip in the run-time, thus bringing it to the - most recent version. Unfortunately I couldn't find any mentioning of - the said firmware update for the old chips that I tested the driver - against, so for chips like that the driver only exposes the old - functionality. - - -Parameters exposed over debugfs -------------------------------- -SI476x allow user to get multiple characteristics that can be very -useful for EoL testing/RF performance estimation, parameters that have -very little to do with V4L2 subsystem. Such parameters are exposed via -debugfs and can be accessed via regular file I/O operations. - -The drivers exposes following files: - -* /sys/kernel/debug/<device-name>/acf - This file contains ACF(Automatically Controlled Features) status - information. The contents of the file is binary data of the - following layout: - - Offset | Name | Description - ==================================================================== - 0x00 | blend_int | Flag, set when stereo separation has - | | crossed below the blend threshold - -------------------------------------------------------------------- - 0x01 | hblend_int | Flag, set when HiBlend cutoff - | | frequency is lower than threshold - -------------------------------------------------------------------- - 0x02 | hicut_int | Flag, set when HiCut cutoff - | | frequency is lower than threshold - -------------------------------------------------------------------- - 0x03 | chbw_int | Flag, set when channel filter - | | bandwidth is less than threshold - -------------------------------------------------------------------- - 0x04 | softmute_int | Flag indicating that softmute - | | attenuation has increased above - | | softmute threshold - -------------------------------------------------------------------- - 0x05 | smute | 0 - Audio is not soft muted - | | 1 - Audio is soft muted - -------------------------------------------------------------------- - 0x06 | smattn | Soft mute attenuation level in dB - -------------------------------------------------------------------- - 0x07 | chbw | Channel filter bandwidth in kHz - -------------------------------------------------------------------- - 0x08 | hicut | HiCut cutoff frequency in units of - | | 100Hz - -------------------------------------------------------------------- - 0x09 | hiblend | HiBlend cutoff frequency in units - | | of 100 Hz - -------------------------------------------------------------------- - 0x10 | pilot | 0 - Stereo pilot is not present - | | 1 - Stereo pilot is present - -------------------------------------------------------------------- - 0x11 | stblend | Stereo blend in % - -------------------------------------------------------------------- - - -* /sys/kernel/debug/<device-name>/rds_blckcnt - This file contains statistics about RDS receptions. It's binary data - has the following layout: - - Offset | Name | Description - ==================================================================== - 0x00 | expected | Number of expected RDS blocks - -------------------------------------------------------------------- - 0x02 | received | Number of received RDS blocks - -------------------------------------------------------------------- - 0x04 | uncorrectable | Number of uncorrectable RDS blocks - -------------------------------------------------------------------- - -* /sys/kernel/debug/<device-name>/agc - This file contains information about parameters pertaining to - AGC(Automatic Gain Control) - - The layout is: - Offset | Name | Description - ==================================================================== - 0x00 | mxhi | 0 - FM Mixer PD high threshold is - | | not tripped - | | 1 - FM Mixer PD high threshold is - | | tripped - -------------------------------------------------------------------- - 0x01 | mxlo | ditto for FM Mixer PD low - -------------------------------------------------------------------- - 0x02 | lnahi | ditto for FM LNA PD high - -------------------------------------------------------------------- - 0x03 | lnalo | ditto for FM LNA PD low - -------------------------------------------------------------------- - 0x04 | fmagc1 | FMAGC1 attenuator resistance - | | (see datasheet for more detail) - -------------------------------------------------------------------- - 0x05 | fmagc2 | ditto for FMAGC2 - -------------------------------------------------------------------- - 0x06 | pgagain | PGA gain in dB - -------------------------------------------------------------------- - 0x07 | fmwblang | FM/WB LNA Gain in dB - -------------------------------------------------------------------- - -* /sys/kernel/debug/<device-name>/rsq - This file contains information about parameters pertaining to - RSQ(Received Signal Quality) - - The layout is: - Offset | Name | Description - ==================================================================== - 0x00 | multhint | 0 - multipath value has not crossed - | | the Multipath high threshold - | | 1 - multipath value has crossed - | | the Multipath high threshold - -------------------------------------------------------------------- - 0x01 | multlint | ditto for Multipath low threshold - -------------------------------------------------------------------- - 0x02 | snrhint | 0 - received signal's SNR has not - | | crossed high threshold - | | 1 - received signal's SNR has - | | crossed high threshold - -------------------------------------------------------------------- - 0x03 | snrlint | ditto for low threshold - -------------------------------------------------------------------- - 0x04 | rssihint | ditto for RSSI high threshold - -------------------------------------------------------------------- - 0x05 | rssilint | ditto for RSSI low threshold - -------------------------------------------------------------------- - 0x06 | bltf | Flag indicating if seek command - | | reached/wrapped seek band limit - -------------------------------------------------------------------- - 0x07 | snr_ready | Indicates that SNR metrics is ready - -------------------------------------------------------------------- - 0x08 | rssiready | ditto for RSSI metrics - -------------------------------------------------------------------- - 0x09 | injside | 0 - Low-side injection is being used - | | 1 - High-side injection is used - -------------------------------------------------------------------- - 0x10 | afcrl | Flag indicating if AFC rails - -------------------------------------------------------------------- - 0x11 | valid | Flag indicating if channel is valid - -------------------------------------------------------------------- - 0x12 | readfreq | Current tuned frequency - -------------------------------------------------------------------- - 0x14 | freqoff | Signed frequency offset in units of - | | 2ppm - -------------------------------------------------------------------- - 0x15 | rssi | Signed value of RSSI in dBuV - -------------------------------------------------------------------- - 0x16 | snr | Signed RF SNR in dB - -------------------------------------------------------------------- - 0x17 | issi | Signed Image Strength Signal - | | indicator - -------------------------------------------------------------------- - 0x18 | lassi | Signed Low side adjacent Channel - | | Strength indicator - -------------------------------------------------------------------- - 0x19 | hassi | ditto fpr High side - -------------------------------------------------------------------- - 0x20 | mult | Multipath indicator - -------------------------------------------------------------------- - 0x21 | dev | Frequency deviation - -------------------------------------------------------------------- - 0x24 | assi | Adjacent channel SSI - -------------------------------------------------------------------- - 0x25 | usn | Ultrasonic noise indicator - -------------------------------------------------------------------- - 0x26 | pilotdev | Pilot deviation in units of 100 Hz - -------------------------------------------------------------------- - 0x27 | rdsdev | ditto for RDS - -------------------------------------------------------------------- - 0x28 | assidev | ditto for ASSI - -------------------------------------------------------------------- - 0x29 | strongdev | Frequency deviation - -------------------------------------------------------------------- - 0x30 | rdspi | RDS PI code - -------------------------------------------------------------------- - -* /sys/kernel/debug/<device-name>/rsq_primary - This file contains information about parameters pertaining to - RSQ(Received Signal Quality) for primary tuner only. Layout is as - the one above. |