[PATCH RFC wireless-next 0/4] wifi: b43: AC-PHY support (series 4/4)

[Andreas Wendleder <gonsolo@gmail.com>]

Radio 2069 and the AC PHY: tables, 2.4 GHz and 5 GHz channel switching
(5 GHz in 80 MHz mode), HT and VHT capabilities, and the removal of
"depends on BROKEN". Based on series 3/4.

With the four series b43 brings up a BCM4360 on 2.4 GHz and 5 GHz, with HT
at 20 MHz on 2.4 GHz and VHT at 80 MHz on 5 GHz (40 MHz is untested), two
streams and A-MPDU.

Each patch compiles on its own (kernel 7.2.10 headers). The four series
together were run on a MacBookAir6,1 (14e4:43a0, BCM4360, core revision 42,
microcode 832.127, 2 of 3 chains wired) on top of v7.3-rc5's b43. The AC PHY
only comes with series 4, so the earlier series cannot be exercised on this
hardware alone. Association and traffic with WPA2 (software
crypto) on 2.4 GHz (HT, about 54-63 Mbit/s) and on 5 GHz (VHT, 80 MHz block,
two streams, 40-70 Mbit/s at -78 dBm), no errors in the log. Not tested:
suspend/resume with this exact series, other boards. Not done: TX
calibration, hardware crypto, power save.

Known issues, which a review would ask to fix (pointed out by Alessio
Ferri): the number of AC cores is forced to 2 on the MacBook boards
(0x117, 0x137) and some init loops assume 2 cores, which is wrong for
3-chain boards; and SROM revision 11 values are read at fixed word
offsets instead of from parsed SPROM fields (the parsing is in his bcma
series, not merged yet).

Where the values come from: the register sequences and table contents were
taken from Broadcom's wl driver running on this MacBook, by tracing its
register accesses (bpftrace on wl's MMIO accessors), and reduced to what
the hardware needs. Parts come from Alessio Ferri's AC-PHY work (the PHY
init sequence, the 40 and 80 MHz coefficient tables, a TX gain table, the
Farrow resampler formula, the VHT fields of the TX descriptor, register
and table names), and some formats follow brcmsmac.
The result was tested on the hardware as described below.

Andreas Wendleder (4):
  wifi: b43: radio 2069 and AC-PHY tables
  wifi: b43: AC-PHY init and 2.4 GHz channel switching
  wifi: b43: 5 GHz, 80 MHz and VHT for the AC PHY
  wifi: b43: enable the AC-PHY support

 drivers/net/wireless/broadcom/b43/Kconfig     |    4 +-
 drivers/net/wireless/broadcom/b43/Makefile    |    2 +-
 drivers/net/wireless/broadcom/b43/main.c      |   69 +-
 drivers/net/wireless/broadcom/b43/phy_ac.c    | 1263 +++++++++++++++-
 drivers/net/wireless/broadcom/b43/phy_ac.h    |    4 +
 .../net/wireless/broadcom/b43/phy_ac_farrow.h |  260 ++++
 .../net/wireless/broadcom/b43/phy_common.c    |   25 +-
 .../net/wireless/broadcom/b43/radio_2069.c    |  862 +++++++++++
 .../net/wireless/broadcom/b43/radio_2069.h    |   19 +
 .../net/wireless/broadcom/b43/tables_phy_ac.c | 1273 +++++++++++++++++
 .../net/wireless/broadcom/b43/tables_phy_ac.h |   31 +
 11 files changed, 3801 insertions(+), 11 deletions(-)
 create mode 100644 drivers/net/wireless/broadcom/b43/phy_ac_farrow.h
 create mode 100644 drivers/net/wireless/broadcom/b43/radio_2069.c
 create mode 100644 drivers/net/wireless/broadcom/b43/radio_2069.h
 create mode 100644 drivers/net/wireless/broadcom/b43/tables_phy_ac.c
 create mode 100644 drivers/net/wireless/broadcom/b43/tables_phy_ac.h


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