From 5c026445f0d455976c3d29ebdf10dd89c9f29068 Mon Sep 17 00:00:00 2001
From: Duncan Laurie <dlaurie@chromium.org>
Date: Wed, 11 May 2016 14:05:07 -0700
Subject: drivers/intel/wifi: Add support for generating SSDT table

Intel WiFi devices that support wake-on-wifi need to declare a Power
Resource for this wake pin.  Typically this has been done with a
static declaration in the DSDT for each mainboard.  By adding it to
the existing intel/wifi driver it can be done based on a
configuration register in the devicetree.

Additionally the WiFi regulatory domain can be set in the SSDT
directly instead of needing to use NVS to pass the value to the DSDT.

Also add device IDs for Wilkins Peak 2 and Stone Peak 2 devices that
are found on Chromebooks, and clean up a long line and some comment
formatting.

This was tested by booting on an HP Chromebook 13 device and comparing
that the output in the SSDT matches what used to be in the DSDT.  The
WRDD value is read from VPD, if present, not from devicetree.cb.

Additionally the case where CONFIG_DRIVERS_INTEL_WIFI is enabled but
the wifi device is not described in devicetree.cb is tested to ensure
it still generates the AML but does not include the _PRW wake pin.

Example:

devicetree.cb:
  device pci 1c.0 on
    chip drivers/intel/wifi
      register "wake" = "GPE0_DW0_16"
      device pci 00.0 on end
    end
  end

VPD:
  "region"="us"

SSDT.dsl:
  Scope (\_SB.PCI0.RP01) {
    Device (WIFI) {
      Name (_UID, Zero)
      Name (_DDN, "Intel WiFi")
      Name (_ADR, 0x00000000)
      Name (_PRW, Package () { 16, 3 })
      Name (WRDD, Package () {
        Zero,
        Package () {
          0x00000007,
          0x00004150
        }
      })
    }
  }

Change-Id: I8b5c916f1a04742507dc1ecc9a20c19d3822b18c
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/15019
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
---
 src/drivers/intel/wifi/chip.h | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 src/drivers/intel/wifi/chip.h

(limited to 'src/drivers/intel/wifi/chip.h')

diff --git a/src/drivers/intel/wifi/chip.h b/src/drivers/intel/wifi/chip.h
new file mode 100644
index 0000000000..117d39caf0
--- /dev/null
+++ b/src/drivers/intel/wifi/chip.h
@@ -0,0 +1,3 @@
+struct drivers_intel_wifi_config {
+	unsigned wake; /* Wake pin for ACPI _PRW */
+};
-- 
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