From: Rakesh Pillai <pillair@xxxxxxxxxxxxxx>
Enable STA idle mode power save(IMPS) for WCN3990 TLV target.
In-order to support STA idle mode ps direct access to CE registers are
protected via 2 mechanism. As target can power collapse based on idle
inactivity and any target register access during that state can lead to
un-clocked access.
2) Caching SRRI/DRRI in DDR.
WN3990 has a shadow block in HW which is always on domain and allows HOST/APPS
access irrespective of power state of the target(Common subsystem(includes CE block)
might be down due to idle/inactivity).
Any operation on the shadow registers are directly reflected back in the actual
CE registers( SRWI/DRWI) once common subsystem gets up.
The shadow registers configuration is supplied via QMI message.
WC3990 has 24 shadow registers and mapping of shadow register(0-23) to CE registers(0-12)
is as following.
-----------------------------------------------------------
Shadow Register | CE | src/dst write index
-----------------------------------------------------------
0 | 0 | src
3 | 3 | src
4 | 4 | src
5 | 5 | src
7 | 7 | src
13 | 1 | dst
14 | 2 | dst
19 | 7 | dst
20 | 8 | dst
21 | 9 | dst
22 | 10 | dst
23 | 11 | dst
1) Caching SRWI/SRWI in HW shadow block.
Since shadow block allows only WRITE access, for read access(SRRI/DRRI) driver allocates
region in DDR(12CE*half WORD) which is being configured in CE UPD control register.
CE SRRI/DRRI are restored and replayed on the configured region(DDR) on each update.
HOST/APPS reads SRRI/DRRI from the DDR to make the access independent of target power state.
Changes in v2:
- Disabled the shadow_reg_support and rri_on_ddr hw params for QCA988X_HW_2_0_VERSION
- Fixed checkpatch warnings
Govind Singh (2):
ath10k: Enable SRRI/DRRI support on ddr for WCN3990
ath10k: Enable sta idle power save
Rakesh Pillai (2):
ath10k: Add hw params for shadow register support
ath10k: Add support for shadow register for WNC3990
drivers/net/wireless/ath/ath10k/ce.c | 245 +++++++++++++++++++++++++++++++--
drivers/net/wireless/ath/ath10k/ce.h | 14 ++
drivers/net/wireless/ath/ath10k/core.c | 28 ++++
drivers/net/wireless/ath/ath10k/hw.c | 9 +-
drivers/net/wireless/ath/ath10k/hw.h | 17 ++-
drivers/net/wireless/ath/ath10k/mac.c | 7 +
drivers/net/wireless/ath/ath10k/snoc.c | 3 +
7 files changed, 312 insertions(+), 11 deletions(-)
--
2.14.1
