mainboard/dell: Add new mainboard XPS 8300 (Sandy Bridge)

Mainboard is identified as 0Y2MRG.
The version tested is with Nvidia dGPU (gfx 560ti).

The flash is a 4MiB Winbond W25Q32BVSIG.
It can be flashed internally with flashrom.
Add a strap on the service mode pin of the mainboard for internal flash.

Tested working:
- SeaBIOS
- All USB ports
- SATA
- dGPU
- Ethernet
- Environment control
- GPIOs
- S3 Sleep mode
- WakeOnLan

Change-Id: I7d394794fec580bc7aed3f6396ceb47d4a6fd059
Signed-off-by: Ronald Claveau <sousmangoosta@aliel.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83104
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/mainboard/dell/xps_8300/smihandler.c b/src/mainboard/dell/xps_8300/smihandler.c
new file mode 100644
index 0000000000..f126468fa5
--- /dev/null
+++ b/src/mainboard/dell/xps_8300/smihandler.c
@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <types.h>
+#include <acpi/acpi.h>
+#include <cpu/x86/smm.h>
+#include <superio/ite/common/ite.h>
+#include <superio/ite/it8772f/it8772f.h>
+
+#define GPIO_DEV PNP_DEV(0x2e, IT8772F_GPIO)
+
+void mainboard_smi_sleep(u8 slp_typ)
+{
+	switch (slp_typ) {
+	case ACPI_S3:
+		ite_set_3vsbsw(GPIO_DEV, true);
+		ite_delay_pwrgd3(GPIO_DEV);
+		it8772f_gpio_led(
+			GPIO_DEV,
+			2 /* set */,
+			0x02 /* select */,
+			0x01 /* polarity */,
+			0x01 /* 1 = pullup */,
+			0x01 /* output */,
+			0x00 /* 1 = Simple IO function */,
+			SIO_GPIO_BLINK_GPIO22,
+			IT8772F_GPIO_BLINK_FREQUENCY_1_HZ);
+		break;
+	default:
+		break;
+	}
+}