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authorFurquan Shaikh <furquan@chromium.org>2017-05-23 11:53:47 -0700
committerMartin Roth <martinroth@google.com>2017-05-25 18:37:33 +0200
commita6f0b2754b0eea323db60d95fc59e1f08bc060e4 (patch)
treef7095eaaf3fe2273cac5adebba4a67adc5810d86 /src/soc/intel/skylake/acpi
parentd635506fa7d8967ddec08a029a61a4ce57347ed5 (diff)
downloadcoreboot-a6f0b2754b0eea323db60d95fc59e1f08bc060e4.tar.xz
soc/intel/skylake: Implement GPIO ACPI AML generating functions
Implement GPIO ACPI AML generating functions that can be called by coreboot drivers to generate GPIO manipulation code in AML. Following API functions are implemented: 1. acpigen_soc_read_rx_gpio 2. acpigen_soc_get_tx_gpio 3. acpigen_soc_set_tx_gpio 4. acpigen_soc_clear_tx_gpio In addition to the API functions above, helper functions are added to gpio.asl to set/clear/get Tx value of GPIO. BUG=b:62028489 Change-Id: I77e5d0decd8929a922d06b02312378f092551667 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/19828 Reviewed-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/skylake/acpi')
-rw-r--r--src/soc/intel/skylake/acpi/gpio.asl46
1 files changed, 45 insertions, 1 deletions
diff --git a/src/soc/intel/skylake/acpi/gpio.asl b/src/soc/intel/skylake/acpi/gpio.asl
index 0c5a793dc3..fb220959d5 100644
--- a/src/soc/intel/skylake/acpi/gpio.asl
+++ b/src/soc/intel/skylake/acpi/gpio.asl
@@ -120,7 +120,7 @@ Method (GADD, 1, NotSerialized)
}
/*
- * Get GPIO Value
+ * Get GPIO Rx Value
* Arg0 - GPIO Number
*/
Method (GRXS, 1, Serialized)
@@ -134,3 +134,47 @@ Method (GRXS, 1, Serialized)
Return (Local0)
}
+
+/*
+ * Get GPIO Tx Value
+ * Arg0 - GPIO Number
+ */
+Method (GTXS, 1, Serialized)
+{
+ OperationRegion (PREG, SystemMemory, GADD (Arg0), 4)
+ Field (PREG, AnyAcc, NoLock, Preserve)
+ {
+ VAL0, 32
+ }
+ And (GPIOTXSTATE_MASK, ShiftRight (VAL0, GPIOTXSTATE_SHIFT), Local0)
+
+ Return (Local0)
+}
+
+/*
+ * Set GPIO Tx Value
+ * Arg0 - GPIO Number
+ */
+Method (STXS, 1, Serialized)
+{
+ OperationRegion (PREG, SystemMemory, GADD (Arg0), 4)
+ Field (PREG, AnyAcc, NoLock, Preserve)
+ {
+ VAL0, 32
+ }
+ Or (GPIOTXSTATE_MASK, VAL0, VAL0)
+}
+
+/*
+ * Clear GPIO Tx Value
+ * Arg0 - GPIO Number
+ */
+Method (CTXS, 1, Serialized)
+{
+ OperationRegion (PREG, SystemMemory, GADD (Arg0), 4)
+ Field (PREG, AnyAcc, NoLock, Preserve)
+ {
+ VAL0, 32
+ }
+ And (Not (GPIOTXSTATE_MASK), VAL0, VAL0)
+}