drivers/usb/acpi: Add support for RTD3 for Intel Bluetooth

Add support for RTD3 for Intel Bluetooth. This is done by
controlling the enable GPIO (GPP_VGPIO_0 for most SOCs) that
exists on all wireless cards since Jefferson Peak.

The exception is GalePeak2, which uses VSEC and this driver doesn't
support that.

Change-Id: Ibea97ab0ae0a9f1eb6aaca43d831bb4ce7bdc02e
Signed-off-by: Sean Rhodes <sean@starlabs.systems>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84626
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nicholas Sudsgaard <devel+coreboot@nsudsgaard.com>

3 files changed, 110 insertions, 10 deletions

diff --git a/src/drivers/usb/acpi/chip.h b/src/drivers/usb/acpi/chip.h
index afd99715b9..a27ce4468c 100644
--- a/src/drivers/usb/acpi/chip.h
+++ b/src/drivers/usb/acpi/chip.h
@@ -88,7 +88,9 @@ struct drivers_usb_acpi_config {
 bool usb_acpi_get_pld(const struct device *usb_device, struct acpi_pld *pld);
 
 /* Intel Bluetooth */
-void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload);
-void acpi_device_intel_bt_common(void);
+void acpi_device_intel_bt(unsigned int reset_gpio,
+			  unsigned int enable_gpio,
+			  bool audio_offload);
+void acpi_device_intel_bt_common(unsigned int enable_gpio);
 
 #endif /* __USB_ACPI_CHIP_H__ */
diff --git a/src/drivers/usb/acpi/intel_bluetooth.c b/src/drivers/usb/acpi/intel_bluetooth.c
index 1775286be4..49b2138ba7 100644
--- a/src/drivers/usb/acpi/intel_bluetooth.c
+++ b/src/drivers/usb/acpi/intel_bluetooth.c
@@ -13,10 +13,15 @@
  * BIT(1)	Check Tile Activation
  *
  * Check/Set Reset Delay (aa10f4e0-81ac-4233-abf6-3b2ac50e28d9)
- * Arg2 == 0: Return a package with the following bit set
+ * Arg2 == 0:	Return a package with the following bit set
  * BIT(0)	Indicates whether the device supports other functions
  * BIT(1)	Check Bluetooth reset timing
- * Arg2 == 1: Set the reset delay based on Arg3
+ *
+ * Arg2 == 1:	Set the reset delay based on Arg3
+ *
+ * Arg2 == 3:	Set the reset method based on Arg3 (Not supported by this driver)
+ * WDISABLE2 (BT_RF_KILL_N)
+ * VSEC (PCI Config Space)
  */
 
 static void check_reset_delay(void *arg)
@@ -53,7 +58,7 @@ static void get_feature_flag(void *arg)
 void (*uuid_callbacks1[])(void *) = { check_reset_delay, set_reset_delay };
 void (*uuid_callbacks2[])(void *) = { get_feature_flag };
 
-void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload)
+void acpi_device_intel_bt(unsigned int reset_gpio, unsigned int enable_gpio, bool audio_offload)
 {
 /*
  *	Name (RDLY, 0x69)
@@ -129,13 +134,15 @@ void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload)
  *	{
  *		Method (_STA, 0, NotSerialized)
  *		{
- *			Return (One)
+ *			Return (\_SB.PCI0.GBTE())
  *		}
  *		Method (_ON, 0, NotSerialized)
  *		{
+ *			\_SB.PCI0.SBTE(1)
  *		}
  *		Method (_OFF, 0, NotSerialized)
  *		{
+ *			\_SB.PCI0.SBTE(0)
  *		}
  *		Method (_RST, 0, NotSerialized)
  *		{
@@ -155,14 +162,34 @@ void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload)
 	{
 		acpigen_write_method("_STA", 0);
 		{
-			acpigen_write_return_integer(1);
+			if (enable_gpio) {
+				acpigen_write_store();
+				acpigen_emit_namestring("\\_SB.PCI0.GBTE");
+				acpigen_emit_byte(LOCAL0_OP);
+
+				acpigen_write_return_op(LOCAL0_OP);
+			} else {
+				acpigen_write_return_integer(1);
+			}
 		}
 		acpigen_pop_len();
 
 		acpigen_write_method("_ON", 0);
+		{
+			if (enable_gpio) {
+				acpigen_emit_namestring("\\_SB.PCI0.SBTE");
+				acpigen_emit_byte(1);
+			}
+		}
 		acpigen_pop_len();
 
 		acpigen_write_method("_OFF", 0);
+		{
+			if (enable_gpio) {
+				acpigen_emit_namestring("\\_SB.PCI0.SBTE");
+				acpigen_emit_byte(0);
+			}
+		}
 		acpigen_pop_len();
 
 		acpigen_write_method("_RST", 0);
@@ -233,6 +260,32 @@ void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload)
 	acpigen_pop_len();
 
 /*
+ *	Name (_PR0, Package (0x01)
+ *	{
+ *		BTRT
+ *	})
+ */
+	acpigen_write_name("_PR0");
+	{
+		acpigen_write_package(1);
+		acpigen_emit_namestring("BTRT");
+	}
+	acpigen_pop_len();
+
+/*
+ *	Name (_PR3, Package (0x01)
+ *	{
+ *		BTRT
+ *	})
+ */
+	acpigen_write_name("_PR3");
+	{
+		acpigen_write_package(1);
+		acpigen_emit_namestring("BTRT");
+	}
+	acpigen_pop_len();
+
+/*
  *	Method (AOLD, 0, Serialized)
  *	{
  *		Name (AODS, Package (0x03)
@@ -261,7 +314,7 @@ void acpi_device_intel_bt(unsigned int reset_gpio, bool audio_offload)
 	acpigen_pop_len();
 }
 
-void acpi_device_intel_bt_common(void)
+void acpi_device_intel_bt_common(unsigned int enable_gpio)
 {
 	acpigen_write_scope("\\_SB.PCI0");
 /*
@@ -269,5 +322,48 @@ void acpi_device_intel_bt_common(void)
  */
 	acpigen_write_mutex("CNMT", 0);
 
+/*
+ *	Method (SBTE, 1, Serialized)
+ *	{
+ *		If (Arg0 == 1)
+ *		{
+ *			STXS(enable_gpio)
+ *		} Else {
+ *			CTXS(enable_gpio)
+ *		}
+ *	}
+ */
+	acpigen_write_method_serialized("SBTE", 1);
+	{
+		if (enable_gpio) {
+			acpigen_write_if_lequal_op_int(ARG0_OP, 1);
+			{
+				acpigen_soc_set_tx_gpio(enable_gpio);
+			}
+			acpigen_write_else();
+			{
+				acpigen_soc_clear_tx_gpio(enable_gpio);
+			}
+			acpigen_pop_len();
+		}
+	}
+	acpigen_pop_len();
+
+/*
+ *	Method (GBTE, 0, NotSerialized)
+ *	{
+ *		Return (GTXS (enable_gpio))
+ *	}
+ */
+	acpigen_write_method("GBTE", 0);
+	{
+		acpigen_emit_byte(RETURN_OP);
+		if (enable_gpio)
+			acpigen_soc_get_tx_gpio(enable_gpio);
+		else
+			acpigen_emit_byte(0);
+	}
+	acpigen_pop_len();
+
 	acpigen_pop_len();
 }
diff --git a/src/drivers/usb/acpi/usb_acpi.c b/src/drivers/usb/acpi/usb_acpi.c
index 0087cbed54..8960e3d05b 100644
--- a/src/drivers/usb/acpi/usb_acpi.c
+++ b/src/drivers/usb/acpi/usb_acpi.c
@@ -108,7 +108,9 @@ static void usb_acpi_fill_ssdt_generator(const struct device *dev)
 	}
 
 	if (config->is_intel_bluetooth)
-		acpi_device_intel_bt(config->reset_gpio.pins[0], config->cnvi_bt_audio_offload);
+		acpi_device_intel_bt(config->reset_gpio.pins[0],
+				     config->enable_gpio.pins[0],
+				     config->cnvi_bt_audio_offload);
 
 	acpigen_pop_len();
 
@@ -117,7 +119,7 @@ static void usb_acpi_fill_ssdt_generator(const struct device *dev)
 	 * other code to access it i.e. CNVi driver.
 	 */
 	if (config->is_intel_bluetooth)
-		acpi_device_intel_bt_common();
+		acpi_device_intel_bt_common(config->enable_gpio.pins[0]);
 
 	printk(BIOS_INFO, "%s: %s at %s\n", path,
 	       config->desc ? : dev->chip_ops->name, dev_path(dev));