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From: Tsuchiya Yuto <kitakar@gmail.com>
To: Amitkumar Karwar <amitkarwar@gmail.com>,
	Ganapathi Bhat <ganapathi.bhat@nxp.com>,
	Xinming Hu <huxinming820@gmail.com>,
	Kalle Valo <kvalo@codeaurora.org>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>
Cc: linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Maximilian Luz <luzmaximilian@gmail.com>,
	Andy Shevchenko <andriy.shevchenko@intel.com>,
	verdre@v0yd.nl, Tsuchiya Yuto <kitakar@gmail.com>
Subject: [RFC PATCH 0/3] mwifiex: add fw reset quirks for Microsoft Surface
Date: Wed, 28 Oct 2020 23:27:50 +0900	[thread overview]
Message-ID: <20201028142753.18855-1-kitakar@gmail.com> (raw)

Hello all,

This series adds firmware reset quirks for Microsoft Surface devices
(PCIe-88W8897). Surface devices somehow requires quirks to reset the
firmware. Otherwise, current mwifiex driver can reset only software level.
This is not enough to recover from a bad state.

To do so, in the first patch, I added a DMI-based quirk implementation
for Surface devices that use mwifiex chip.

The required quirk is different by generation. Surface gen3 devices
(Surface 3 and Surface Pro 3) require a quirk that calls _DSM method
(the third patch).
Note that Surface Pro 3 is not yet supported because of the difference
between Surface 3. On Surface 3, the wifi card will be immediately
removed/reprobed after the _DSM call. On the other hand, Surface Pro 3
doesn't. Need to remove/reprobe wifi card ourselves. This behavior makes
the support difficult.

Surface gen4+ devices (Surface Pro 4 and later) require a quirk that
puts wifi into D3cold before FLR.

While here, created new files for quirks (mwifiex/pcie_quirks.c and
mwifiex/pcie_quirks.h) because the changes are a little bit too big to
add into pcie.c.

Thanks,
Tsuchiya Yuto

Tsuchiya Yuto (3):
  mwifiex: pcie: add DMI-based quirk impl for Surface devices
  mwifiex: pcie: add reset_d3cold quirk for Surface gen4+ devices
  mwifiex: pcie: add reset_wsid quirk for Surface 3

 drivers/net/wireless/marvell/mwifiex/Makefile |   1 +
 drivers/net/wireless/marvell/mwifiex/pcie.c   |  21 ++
 drivers/net/wireless/marvell/mwifiex/pcie.h   |   2 +
 .../wireless/marvell/mwifiex/pcie_quirks.c    | 246 ++++++++++++++++++
 .../wireless/marvell/mwifiex/pcie_quirks.h    |  17 ++
 5 files changed, 287 insertions(+)
 create mode 100644 drivers/net/wireless/marvell/mwifiex/pcie_quirks.c
 create mode 100644 drivers/net/wireless/marvell/mwifiex/pcie_quirks.h

-- 
2.29.1


             reply	other threads:[~2020-10-28 23:43 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-28 14:27 Tsuchiya Yuto [this message]
2020-10-28 14:27 ` [RFC PATCH 1/3] mwifiex: pcie: add DMI-based quirk impl for Surface devices Tsuchiya Yuto
     [not found]   ` <20201028152710.GU4077@smile.fi.intel.com>
2020-11-02 10:31     ` Tsuchiya Yuto
2020-10-28 14:27 ` [RFC PATCH 2/3] mwifiex: pcie: add reset_d3cold quirk for Surface gen4+ devices Tsuchiya Yuto
2020-10-28 14:27 ` [RFC PATCH 3/3] mwifiex: pcie: add reset_wsid quirk for Surface 3 Tsuchiya Yuto

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