PHY RELATED FUNCTIONS(9)

🦋 PHY related functions 🦋

okay so this is from the Kernel API Manual, section (9), and bestie… it's a lot. buckle up 💅

✨ DESCRIPTION ✨

so basically this page is all about the low-level functions that handle baseband and the analog frontend (RF) parts. and like — ngl — this is by far the most complex part of the hw code 😭 so pls pls pls make sure you actually know what you're doing before you touch anything. this is not the vibe to fake it through 🫶

here's the rundown of what this whole thing covers:

• Channel setting/switching — the classic bop between channels 💃
• Automatic Gain Control (AGC) calibration — gain but make it self-regulating ✨
• Noise Floor calibration — figuring out how quiet the quiet actually is 🔇
• I/Q imbalance calibration (QAM correction) — fixing that little offset situation 🎀
• Calibration due to thermal changes (gain_F) — because she gets warm and needs a minute 🌡️
• Spur noise mitigation — yeeting the spurious noise, as one does 💀
• RF/PHY initialization for the various operating modes and bwmodes — getting her ready for every mood and every bwmode 💜
• Antenna control — antennas being main characters, as they should 👑
• TX power control per channel/rate/packet type — power levels, but make them specific ⚡

also keep in mind (and this is so real of us) we never got documentation for most of these functions 😭 what we have comes mostly from Atheros's code, reverse engineering and patent docs/presentations etc. so like… we're all just doing our best here fr fr 🙈

🔗 SEE ALSO 🔗

the kernel file lives at ./drivers/net/wireless/ath/ath5k/phy.c — go read it, bestie, it's giving primary source 📖

and here's everyone else you should go say hi to:

• ath5k_hw_radio_revision(9)
• ath5k_channel_ok(9)
• ath5k_hw_chan_has_spur_noise(9)
• ath5k_hw_rfb_op(9)
• ath5k_hw_write_ofdm_timings(9)
• ath5k_hw_phy_disable(9)
• ath5k_hw_wait_for_synth(9)
• RF Gain optimization(9)
• ath5k_hw_rfgain_opt_init(9)
• ath5k_hw_request_rfgain_probe(9)
• ath5k_hw_rf_gainf_corr(9)
• ath5k_hw_rf_check_gainf_readback(9)
• ath5k_hw_rf_gainf_adjust(9)
• ath5k_hw_gainf_calibrate(9)
• ath5k_hw_rfgain_init(9)
• ath5k_hw_rfregs_init(9)
• ath5k_hw_rf5110_chan2athchan(9)
• ath5k_hw_rf5110_channel(9)
• ath5k_hw_rf5111_chan2athchan(9)
• ath5k_hw_rf5111_channel(9)
• ath5k_hw_rf5112_channel(9)
• ath5k_hw_rf2425_channel(9)
• ath5k_hw_channel(9)
• PHY Calibration routines(9)
• ath5k_hw_read_measured_noise_floor(9)
• ath5k_hw_init_nfcal_hist(9)
• ath5k_hw_update_nfcal_hist(9)
• ath5k_hw_get_median_noise_floor(9)
• ath5k_hw_update_noise_floor(9)
• ath5k_hw_rf5110_calibrate(9)
• ath5k_hw_rf511x_iq_calibrate(9)
• ath5k_hw_phy_calibrate(9)
• ath5k_hw_set_spur_mitigation_filter(9)
• Antenna control(9)
• ath5k_hw_set_def_antenna(9)
• ath5k_hw_set_fast_div(9)
• ath5k_hw_set_antenna_switch(9)
• ath5k_hw_set_antenna_mode(9)
• ath5k_get_interpolated_value(9)
• ath5k_get_linear_pcdac_min(9)
• ath5k_create_power_curve(9)
• ath5k_get_chan_pcal_surrounding_piers(9)
• ath5k_get_rate_pcal_data(9)
• ath5k_get_max_ctl_power(9)
• Power to PCDAC table functions(9)
• ath5k_fill_pwr_to_pcdac_table(9)
• ath5k_combine_linear_pcdac_curves(9)
• ath5k_write_pcdac_table(9)
• Power to PDADC table functions(9)
• ath5k_combine_pwr_to_pdadc_curves(9)
• ath5k_write_pwr_to_pdadc_table(9)
• ath5k_setup_channel_powertable(9)
• ath5k_write_channel_powertable(9)
• Per-rate tx power setting(9)
• ath5k_setup_rate_powertable(9)
• ath5k_hw_txpower(9)
• ath5k_hw_set_txpower_limit(9)
• ath5k_hw_phy_init(9)

💖 that's the whole page, bestie — you ate that 💖

this lil slice of lore comes to you from ./drivers/net/wireless/ath/ath5k, dated October 2026 🎀 go forth and calibrate responsibly, mwah 🫶✨