lenovo/x60: Support digitizer on X60t and X201t.

Change-Id: I5b0399a8edca3b73aa7d515d2c446c31b3239fa5
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/5239
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/drivers/Kconfig

@@ -26,6 +26,7 @@ source src/drivers/i2c/Kconfig
 source src/drivers/ics/Kconfig
 source src/drivers/intel/Kconfig
 source src/drivers/ipmi/Kconfig
+source src/drivers/lenovo/Kconfig
 source src/drivers/maxim/Kconfig
 source src/drivers/parade/Kconfig
 if PC80_SYSTEM

src/drivers/Makefile.inc

@@ -23,6 +23,7 @@ subdirs-y += emulation
 subdirs-y += generic
 subdirs-y += i2c
 subdirs-y += intel
+subdirs-y += lenovo
 subdirs-y += maxim
 subdirs-y += net
 subdirs-y += parade

src/drivers/lenovo/Kconfig

@@ -0,0 +1,29 @@
+config DRIVERS_LENOVO_WACOM
+       bool
+       default n
+
+if DRIVERS_LENOVO_WACOM
+
+choice
+	prompt "Digitizer"
+	default DIGITIZER_AUTODETECT
+
+config DIGITIZER_AUTODETECT
+	bool "Autodetect"
+	help
+	  The presence of digitizer is inferred from model number stored in
+	  AT24RF chip.
+
+config DIGITIZER_PRESENT
+	bool "Present"
+	help
+	  The digitizer is assumed to be present.
+
+config DIGITIZER_ABSENT
+	bool "Absent"
+	help
+	  The digitizer is assumed to be absent.
+
+endchoice
+
+endif

src/drivers/lenovo/Makefile.inc

@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_LENOVO_WACOM) += wacom.c

src/drivers/lenovo/lenovo.h

@@ -0,0 +1,3 @@
+int drivers_lenovo_is_wacom_present(void);
+void drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
+					       int have_dock_serial);

src/drivers/lenovo/wacom.c

@@ -0,0 +1,176 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Vladimir Serbinenko
+ *
+ * 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, or (at your
+ * option) any later version, 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <types.h>
+#include <console/console.h>
+#include <arch/acpi.h>
+#include <arch/acpigen.h>
+#include <device/device.h>
+#include <device/pnp.h>
+#include <string.h>
+#include "lenovo.h"
+#include "drivers/i2c/at24rf08c/lenovo.h"
+
+static const char tablet_numbers[][5] = {
+	/* X60t. */
+	"6363", "6364", "6365", "6366",
+	"6367", "6368", "7762", "7763",
+	"7764", "7767", "7768", "7769",
+	/* X201t. */
+	"0053", "0831", "2985", "3093",
+	"3113", "3144", "3239", "4184",
+	"7448", "7449", "7450", "7453",
+	"2263", "2266",
+};
+
+int
+drivers_lenovo_is_wacom_present(void)
+{
+	const char *pn;
+	int i;
+	static int result = -1;
+	device_t superio;
+	u8 sioid;
+
+	if (result != -1)
+		return result;
+
+	if (IS_ENABLED(CONFIG_DIGITIZER_PRESENT)) {
+		printk (BIOS_INFO, "Digitizer state forced as present\n");
+		return (result = 1);
+	}
+
+	if (IS_ENABLED(CONFIG_DIGITIZER_ABSENT)) {
+		printk (BIOS_INFO, "Digitizer state forced as absent\n");
+		return (result = 0);
+	}
+
+	superio = dev_find_slot_pnp (0x164e, 3);
+	if (!superio) {
+		printk (BIOS_INFO, "No Super I/O, skipping wacom\n");
+		return (result = 0);
+	}
+
+	/* Probe ID. */
+	sioid = pnp_read_config(superio, 0x20);
+	if (sioid == 0xff) {
+		printk (BIOS_INFO, "Super I/O probe failed, skipping wacom\n");
+		return (result = 0);
+	}
+
+	pn = lenovo_mainboard_partnumber();
+	if (!pn)
+		return (result = 0);
+	printk (BIOS_DEBUG, "Lenovo P/N is %s\n", pn);
+	for (i = 0; i < ARRAY_SIZE (tablet_numbers); i++)
+		if (memcmp (tablet_numbers[i], pn, 4) == 0) {
+			printk (BIOS_DEBUG, "Lenovo P/N %s is a tablet\n", pn);
+			return (result = 1);
+		}
+	printk (BIOS_DEBUG, "Lenovo P/N %s is not a tablet\n", pn);
+	return (result = 0);
+}
+
+void
+drivers_lenovo_serial_ports_ssdt_generate(const char *scope,
+					  int have_dock_serial)
+{
+	int scopelen, devicelen, reslen, methodlen;
+
+	scopelen = acpigen_write_scope(scope);
+
+	if (drivers_lenovo_is_wacom_present()) {
+		/* Device op.  */
+		scopelen += acpigen_emit_byte(0x5b);
+		scopelen += acpigen_emit_byte(0x82);
+		devicelen = acpigen_write_len_f();
+		devicelen += acpigen_emit_namestring("DTR");
+
+		devicelen += acpigen_write_name("_HID");
+		devicelen += acpigen_emit_eisaid("WACF004");
+
+		devicelen += acpigen_write_name("_CRS");
+
+		reslen = acpigen_write_resourcetemplate_header();
+		reslen += acpigen_write_io16(0x200, 0x200, 1, 8, 1);
+		reslen += acpigen_write_irq((1 << 5));
+
+		devicelen += reslen;
+		devicelen += acpigen_write_resourcetemplate_footer(reslen);
+
+		/* method op */
+		devicelen += acpigen_emit_byte(0x14);
+		methodlen = acpigen_write_len_f();
+		methodlen += acpigen_emit_namestring("_STA");
+		/* no fnarg */
+		methodlen += acpigen_emit_byte(0x00);
+		/* return */
+		methodlen += acpigen_emit_byte(0xa4);
+		methodlen += acpigen_write_byte(0xf);
+
+		acpigen_patch_len(methodlen);
+		devicelen += methodlen;
+
+		acpigen_patch_len(devicelen - 1);
+		scopelen += devicelen;
+	}
+
+	if (have_dock_serial) {
+		/* Device op.  */
+		scopelen += acpigen_emit_byte(0x5b);
+		scopelen += acpigen_emit_byte(0x82);
+		devicelen = acpigen_write_len_f();
+		devicelen += acpigen_emit_namestring("COMA");
+
+		devicelen += acpigen_write_name("_HID");
+		devicelen += acpigen_emit_eisaid("PNP0501");
+		devicelen += acpigen_write_name("_UID");
+		/* Byte */
+		devicelen += acpigen_write_byte(0x2);
+
+		devicelen += acpigen_write_name("_CRS");
+
+		reslen = acpigen_write_resourcetemplate_header();
+		reslen += acpigen_write_io16(0x3f8, 0x3f8, 1, 8, 1);
+		reslen += acpigen_write_irq(1 << 4);
+
+		devicelen += reslen;
+		devicelen += acpigen_write_resourcetemplate_footer(reslen);
+
+		/* method op */
+		devicelen += acpigen_emit_byte(0x14);
+		methodlen = acpigen_write_len_f();
+		methodlen += acpigen_emit_namestring("_STA");
+		/* no fnarg */
+		methodlen += acpigen_emit_byte(0x00);
+		/* return */
+		methodlen += acpigen_emit_byte(0xa4);
+		methodlen += acpigen_write_byte(0xf);
+		acpigen_patch_len(methodlen);
+
+		devicelen += methodlen;
+
+		acpigen_patch_len(devicelen - 1);
+		scopelen += devicelen;
+	}
+
+	acpigen_patch_len(scopelen - 1);
+}