[M] Change in coreboot[main]: drivers/wifi/generic: Add Methods to control CNVi enable GPIO

[Sean Rhodes (Code Review)]

Sean Rhodes has submitted this change. ( https://review.coreboot.org/c/coreboot/+/86402?usp=email )

Change subject: drivers/wifi/generic: Add Methods to control CNVi enable GPIO
......................................................................

drivers/wifi/generic: Add Methods to control CNVi enable GPIO

Add two new methods, CNVS and CNVC, that can check and control
the enable GPIO for a CNVi module.

These will be used by the common code for WiFi SW RF Kill (Low
Power Mode).

Change-Id: I09d0011ede6f739511a61daf2f1b317f6500a343
Signed-off-by: Sean Rhodes 
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86402
Tested-by: build bot (Jenkins) 
Reviewed-by: Matt DeVillier 
---
M src/drivers/wifi/generic/acpi.c
M src/drivers/wifi/generic/chip.h
2 files changed, 70 insertions(+), 0 deletions(-)

Approvals:
  Matt DeVillier: Looks good to me, approved
  build bot (Jenkins): Verified

diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c
index 7820987..8cab106 100644
--- a/src/drivers/wifi/generic/acpi.c
+++ b/src/drivers/wifi/generic/acpi.c
@@ -1181,6 +1181,60 @@
    return wifi_acpi_name;
 }

+#if CONFIG(SOC_INTEL_COMMON_BLOCK_CNVI)
+static void write_cnvi_control(const struct acpi_gpio *gpio)
+{
+
+	acpigen_write_scope("\_SB.PCI0");
+
+/*
+ *	CNVi Status
+ *
+ *	Method (CNVS, 0)
+ *	{
+ *		Local0 = _SB.PCI0.GTXS (gpio)
+ *		Return (Local0)
+ *	}
+ */
+	acpigen_write_method("CNVS", 0);
+	{
+		acpigen_get_tx_gpio(gpio);
+		acpigen_write_return_op(LOCAL0_OP);
+	}
+	acpigen_pop_len();
+/*
+ *	CNVi Control
+ *
+ *	Method (CNVC, 1, NotSerialized)
+ *	{
+ *		If ((Arg0 == One))
+ *		{
+ *			_SB.PCI0.STXS (gpio)
+ *		}
+ *		Else
+ *		{
+ *			_SB.PCI0.CTXS (gpio)
+ *		}
+ *	}
+ */
+	acpigen_write_method("CNVC", 1);
+	{
+		acpigen_write_if_lequal_op_int(ARG0_OP, 1);
+		{
+			acpigen_enable_tx_gpio(gpio);
+		}
+		acpigen_write_else();
+		{
+			acpigen_disable_tx_gpio(gpio);
+		}
+		acpigen_pop_len();
+	}
+	acpigen_pop_len();
+
+	acpigen_write_scope_end();
+}
+#endif
+
 void wifi_cnvi_fill_ssdt(const struct device *dev)
 {
    const char *path;
@@ -1192,4 +1246,10 @@
    	return;

wifi_ssdt_write_properties(dev, path);
+
+#if CONFIG(SOC_INTEL_COMMON_BLOCK_CNVI)
+	const struct drivers_wifi_generic_config *config = dev->chip_info;
+	if (config->cnvi_enable_gpio.pin_count)
+		write_cnvi_control(&config->cnvi_enable_gpio);
+#endif
 }
diff --git a/src/drivers/wifi/generic/chip.h b/src/drivers/wifi/generic/chip.h
index 302dd14..f6a68e2 100644
--- a/src/drivers/wifi/generic/chip.h
+++ b/src/drivers/wifi/generic/chip.h
@@ -3,6 +3,8 @@
 #ifndef _WIFI_GENERIC_H_
 #define _WIFI_GENERIC_H_

+#include <acpi/acpi_device.h>
+
 /**
  * struct drivers_wifi_generic_config - Data structure to contain generic wifi config
  * @wake: Wake pin for ACPI _PRW
@@ -20,6 +22,14 @@
     */
    bool enable_cnvi_ddr_rfim;

+#if CONFIG(SOC_INTEL_COMMON_BLOCK_CNVI)
+	/*
+	 * Enable GPIO for CNVi that will be used for WiFi SW RF Kill (Low
+	 * Power Mode).
+	 */
+	struct acpi_gpio cnvi_enable_gpio;
+#endif
+
    /* Pointer to the Bluetooth companion device */
    DEVTREE_CONST struct device *bluetooth_companion;
 };