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Provide an option to set xHCI LFPS period sampling off time
(SS_U3_LFPS_PRDC_SAMPLING_OFFTIME_CTRL in JSL EDS revision 2.0).
If the option is set in the devicetree, the bits[7:4] in
xHCI MMIO BAR + offset 0x80A4 (PMCTRL_REG) will be updated.
The host will sample LFPS for U3 wake-up detection when suspended, but
it doesn't sample LFPS at all time due to power management, the
default xHCI LFPS period sampling off time is 9ms. If the xHCI LFPS
period sampling off time is not 0ms, the host may miss the
device-initiated U3 wake-up and causes some kind of race condition for
U3 wake-up between the host and the device.
BUG=b:187801363, b:191426542
TEST=build coreboot with xhci_lfps_sampling_offtime_ms and flash
the image to the device. Run following command to check the bits[7:4]:
iotools mmio_read32 "XHCI MMIO BAR + 0x80A4"
Signed-off-by: Ben Kao <ben.kao@intel.com>
Change-Id: I0e13b7f51771dc185a105c5a84a8e377ee4d7d73
Reviewed-on: https://review.coreboot.org/c/coreboot/+/56063
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
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Currently this XHCI driver assumes the PCH XHCI controller, but the TCSS
or North XHCI block has a similar enough PCI MMIO structure to make this
code mostly reusable.
1) Rename everything to drop the `pch_` prefix
2) xhci_update_wake_event() now takes in a pci_devfn_t for the XHCI
controller
3) soc_get_xhci_usb_info() also now takes a pci_devfn_t for the XHCI
controller
BUG=b:172279037
TEST=plug in USB keyboard while in S0, enter S0ix and verify entry via
EC; type on keyboard, verify it wakes up, eventlog contains:
39 | 2020-12-10 09:40:21 | S0ix Enter
40 | 2020-12-10 09:40:42 | S0ix Exit
41 | 2020-12-10 09:40:42 | Wake Source | PME - XHCI (USB 2.0 port) | 1
42 | 2020-12-10 09:40:42 | Wake Source | GPE # | 109
which verifies it still functions for the PCH XHCI controller
Change-Id: I9f28354e031e3eda587f4faf8ef7595dce8b33ea
Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47411
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Add support to check for the Power Management (PM) Status bit for
various internal devices like USB, CNVi etc. and log them into the event
log for debugging purposes.
BUG=b:172279037
TEST=Build and boot to OS in Drawlat. Ensure that the wake up event is
logged into the event log for one of the internal devices eg. USB
bluetooth.
8 | 2020-11-05 15:04:16 | S0ix Enter
9 | 2020-11-05 15:04:29 | S0ix Exit
10 | 2020-11-05 15:04:29 | Wake Source | PME - XHCI (USB 2.0 port) | 8
11 | 2020-11-05 15:04:29 | Wake Source | GPE # | 109
12 | 2020-11-05 15:05:08 | S0ix Enter
13 | 2020-11-05 15:05:14 | S0ix Exit
14 | 2020-11-05 15:05:14 | Wake Source | PME - XHCI (USB 2.0 port) | 8
15 | 2020-11-05 15:05:14 | Wake Source | GPE # | 109
Change-Id: I9f43675b698bf310f6b98b5e775d1259607abbcd
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47226
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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