lenovo/s230u: Add Thinkpad Twist (S230U)
Created using autoport plus some manual work and copying from G505S to
account for the non-H8 EC.
This model uses the same ENE KB9012 EC as the G505S.
Tested:
- Mainboard variant with 8GB Elpida DDR3
- SeaBIOS payload
- Booting into Linux 4.9.6 with Debian/unstable installed on the
internal HDD/SDD slot
- Native raminit
- Both native VGA init and option rom VGA init
- Basic TPM functionality (auto-detection and RNG)
- Battery status readout
- Basic ACPI functions (power button event; power-off; reboot)
- thinkpad-acpi hotkey functions
- thinkpad-acpi LED control (red thinkpad LED)
- Suspend to RAM and resume works
- Mini displayport output works
Known issues:
- Patches needed for EC battery support
https://review.coreboot.org/#/c/18348/
https://review.coreboot.org/#/c/18349/
- No thermal zone since temperature sensing is not H8-compatible
and needs to be reverse engineered.
Not tested:
- msata/wwan (probably works)
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Change-Id: I52bc4515277e5c18afbb14a80a9ac788049f485c
Reviewed-on: https://review.coreboot.org/18351
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/mainboard/lenovo/s230u/smihandler.c b/src/mainboard/lenovo/s230u/smihandler.c
new file mode 100644
index 0000000..755f176
--- /dev/null
+++ b/src/mainboard/lenovo/s230u/smihandler.c
@@ -0,0 +1,140 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2014 Vladimir Serbinenko
+ * Copyright (C) 2017 Tobias Diedrich <ranma+coreboot@tdiedrich.de>
+ *
+ * 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 "ec.h"
+
+#include <arch/io.h>
+#include <console/console.h>
+#include <cpu/x86/smm.h>
+#include <delay.h>
+#include <ec/acpi/ec.h>
+#include <ec/compal/ene932/ec.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+
+#define GPE_PALMDET1 2
+#define GPE_PALMDET2 4
+#define GPE_EC_SCI 7
+#define GPE_EC_SMI 8
+/* FIXME: check this */
+#define GPE_EC_WAKE 13
+
+static void mainboard_smm_init(void)
+{
+ printk(BIOS_DEBUG, "initializing SMI\n");
+}
+
+int mainboard_io_trap_handler(int smif)
+{
+ static int smm_initialized;
+
+ if (!smm_initialized) {
+ mainboard_smm_init();
+ smm_initialized = 1;
+ }
+
+ return 0;
+}
+
+enum sleep_states {
+ S0 = 0,
+ S1 = 1,
+ S3 = 3,
+ S4 = 4,
+ S5 = 5,
+};
+
+enum ec_smi_event {
+ EC_SMI_EVENT_IDLE = 0x80,
+ EC_SMI_BATTERY_LOW = 0xb3,
+};
+
+/* Tell EC to operate in APM mode. Events generate SMIs instead of SCIs. */
+static void ec_enter_apm_mode(void)
+{
+ ec_kbc_write_cmd(0x59);
+ ec_kbc_write_ib(0xE9);
+}
+/* Tell EC to operate in ACPI mode, thus generating SCIs on events, not SMIs. */
+static void ec_enter_acpi_mode(void)
+{
+ ec_kbc_write_cmd(0x59);
+ ec_kbc_write_ib(0xE8);
+}
+
+static uint8_t ec_get_smi_event(void)
+{
+ ec_kbc_write_cmd(0x56);
+ return ec_kbc_read_ob();
+}
+
+static void ec_process_smi(uint8_t src)
+{
+ /*
+ * Reading the SMI source satisfies the EC in terms of responding to
+ * the event, regardless of whether we take an action or not.
+ */
+
+ printk(BIOS_DEBUG, "Unhandled EC_SMI event 0x%x\n", src);
+}
+
+static void handle_ec_smi(void)
+{
+ uint8_t src;
+
+ while ((src = ec_get_smi_event()) != EC_SMI_EVENT_IDLE)
+ ec_process_smi(src);
+}
+
+void mainboard_smi_gpi(u32 gpi_sts)
+{
+ if (gpi_sts & (1 << GPE_EC_SMI))
+ handle_ec_smi();
+}
+
+int mainboard_smi_apmc(u8 data)
+{
+ printk(BIOS_INFO, "mainboard_smi_apmc(%02x)\n", data);
+
+ switch (data) {
+ case APM_CNT_ACPI_ENABLE:
+ printk(BIOS_DEBUG, "Enable ACPI mode\n");
+ ec_enter_acpi_mode();
+ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
+ gpi_route_interrupt(GPE_PALMDET1, GPI_IS_SCI);
+ gpi_route_interrupt(GPE_PALMDET2, GPI_IS_SCI);
+ break;
+ case APM_CNT_ACPI_DISABLE:
+ printk(BIOS_DEBUG, "Disable ACPI mode\n");
+ ec_enter_apm_mode();
+ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
+ break;
+ default:
+ printk(BIOS_DEBUG, "Unhandled ACPI command: 0x%x\n", data);
+ }
+ return 0;
+}
+
+void mainboard_smi_sleep(u8 slp_typ)
+{
+ if (slp_typ == S3) {
+ u8 ec_wake = ec_read(0x32);
+ /* If EC wake events are enabled, enable wake on EC WAKE GPE. */
+ if (ec_wake & 0x14)
+ gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI);
+ }
+}