mainboard/lenovo: add Lenovo Z61t laptop

This platform shares most hardware components with first-gen Core
Lenovo laptops such as T60/X60, with much smaller EEPROM size as
one of notable differences. The port features Intel graphics,
ATI-based version should work with vendor VBIOS.

Tested peripherals:
 - sleep/resume,
 - USB ports,
 - ACPI Fn key bindings/volume buttons,
 - backlight control,
 - ethernet,
 - wireless (under Linux),
 - sound/beep,
 - dock handling,
 - serial via dock.

Untested peripherals:
 - IrDA,
 - parallel port,
 - PCMCIA,
 - S-Video port,
 - modem,
 - FP reader (should just work),
 - IEEE1394.

Linux 3.16 works with native gfxinit perfectly, with Intel VBIOS
console sometimes displays nothing when i915 framebuffer is used.

Windows 7 has an interrupt assignment issue with iw3945, otherwise
tested stuff is fine.

Change-Id: I84c89cc47d3db126d827f92d50270954bc42f224
Signed-off-by: Andrey Korolyov <andrey@xdel.ru>
Reviewed-on: https://review.coreboot.org/21019
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

1 files changed, 176 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/z61t/smihandler.c b/src/mainboard/lenovo/z61t/smihandler.c
new file mode 100644
index 0000000000..ef5cfc64a2
--- /dev/null
+++ b/src/mainboard/lenovo/z61t/smihandler.c
@@ -0,0 +1,176 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; version 2 of
+ * the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <cpu/x86/smm.h>
+#include "southbridge/intel/i82801gx/nvs.h"
+#include "southbridge/intel/i82801gx/i82801gx.h"
+#include <ec/acpi/ec.h>
+#include "dock.h"
+#include "smi.h"
+
+#define GPE_EC_SCI	12
+
+#define LVTMA_BL_MOD_LEVEL 0x7af9 /* ATI Radeon backlight level */
+
+static void mainboard_smm_init(void)
+{
+	printk(BIOS_DEBUG, "initializing SMI\n");
+	/* Enable 0x1600/0x1600 register pair */
+	ec_set_bit(0x00, 0x05);
+}
+
+static void mainboard_smi_brightness_down(void)
+{
+	u8 *bar;
+	if ((bar = (u8 *)pci_read_config32(PCI_DEV(1, 0, 0), 0x18))) {
+		printk(BIOS_DEBUG, "bar: %08X, level %02X\n",  (unsigned int)bar,
+			*(bar+LVTMA_BL_MOD_LEVEL));
+		*(bar+LVTMA_BL_MOD_LEVEL) &= 0xf0;
+		if (*(bar+LVTMA_BL_MOD_LEVEL) > 0x10)
+			*(bar+LVTMA_BL_MOD_LEVEL) -= 0x10;
+	}
+}
+
+static void mainboard_smi_brightness_up(void)
+{
+	u8 *bar;
+	if ((bar = (u8 *)pci_read_config32(PCI_DEV(1, 0, 0), 0x18))) {
+		printk(BIOS_DEBUG, "bar: %08X, level %02X\n",  (unsigned int )bar,
+			*(bar+LVTMA_BL_MOD_LEVEL));
+		*(bar+LVTMA_BL_MOD_LEVEL) |= 0x0f;
+		if (*(bar+LVTMA_BL_MOD_LEVEL) < 0xf0)
+			*(bar+LVTMA_BL_MOD_LEVEL) += 0x10;
+	}
+}
+
+int mainboard_io_trap_handler(int smif)
+{
+	static int smm_initialized;
+
+	if (!smm_initialized) {
+		mainboard_smm_init();
+		smm_initialized = 1;
+	}
+
+	switch (smif) {
+	case SMI_DOCK_CONNECT:
+		/* If there's an legacy I/O module present, we're not
+		 * allowed to connect the Docking LPC Bus, as both Super I/O
+		 * chips are using 0x2e as base address.
+		 */
+		if (legacy_io_present())
+			break;
+
+		if (!dock_connect()) {
+			/* set dock LED to indicate status */
+			ec_write(0x0c, 0x08);
+			ec_write(0x0c, 0x89);
+		} else {
+			/* blink dock LED to indicate failure */
+			ec_write(0x0c, 0xc8);
+			ec_write(0x0c, 0x09);
+		}
+		break;
+
+	case SMI_DOCK_DISCONNECT:
+		dock_disconnect();
+		ec_write(0x0c, 0x09);
+		ec_write(0x0c, 0x08);
+		break;
+
+	case SMI_BRIGHTNESS_UP:
+		mainboard_smi_brightness_up();
+		break;
+
+	case SMI_BRIGHTNESS_DOWN:
+		mainboard_smi_brightness_down();
+		break;
+
+	default:
+		return 0;
+	}
+
+	/* On success, the IO Trap Handler returns 1
+	 * On failure, the IO Trap Handler returns a value != 1 */
+	return 1;
+}
+
+static void mainboard_smi_handle_ec_sci(void)
+{
+	u8 status = inb(EC_SC);
+	u8 event;
+
+	if (!(status & EC_SCI_EVT))
+		return;
+
+	event = ec_query();
+	printk(BIOS_DEBUG, "EC event %02x\n", event);
+
+	switch(event) {
+		/* brightness up */
+		case 0x14:
+			mainboard_smi_brightness_up();
+			break;
+		/* brightness down */
+		case 0x15:
+			mainboard_smi_brightness_down();
+			break;
+		/* Fn-F9 Key */
+		case 0x18:
+		/* power loss */
+		case 0x27:
+		/* undock event */
+		case 0x50:
+			mainboard_io_trap_handler(SMI_DOCK_DISCONNECT);
+			break;
+		/* dock event */
+		case 0x37:
+			mainboard_io_trap_handler(SMI_DOCK_CONNECT);
+			break;
+		default:
+			break;
+	}
+}
+
+void mainboard_smi_gpi(u32 gpi)
+{
+	if (gpi & (1 << GPE_EC_SCI))
+		mainboard_smi_handle_ec_sci();
+}
+
+int mainboard_smi_apmc(u8 data)
+{
+	switch(data) {
+		case APM_CNT_ACPI_ENABLE:
+			/* use 0x1600/0x1604 to prevent races with userspace */
+			ec_set_ports(0x1604, 0x1600);
+			/* route H8SCI to SCI */
+			gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
+			break;
+		case APM_CNT_ACPI_DISABLE:
+			/* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
+			   provide a EC query function */
+			ec_set_ports(0x66, 0x62);
+			/* route H8SCI# to SMI */
+			gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
+			break;
+		default:
+			break;
+	}
+	return 0;
+}