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author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-01-08 13:58:10 +0200 |
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committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2021-01-24 21:06:22 +0000 |
commit | 0be419947eca04967a9f36d1f843026534cc3569 (patch) | |
tree | db00cd29fbb45cc450b2dbb6092fa37ef9f0704d /src/mainboard/lenovo/g505s/smihandler.c | |
parent | 37eb24be1585a76b293999df43e9a83af7d7ba09 (diff) |
arch/x86: Use wildcard for mb/smihandler.c
Change-Id: I306f8cd74af62c0cd30f445d20c47f774f122481
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49247
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/lenovo/g505s/smihandler.c')
-rw-r--r-- | src/mainboard/lenovo/g505s/smihandler.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/g505s/smihandler.c b/src/mainboard/lenovo/g505s/smihandler.c new file mode 100644 index 0000000000..fa81b280ee --- /dev/null +++ b/src/mainboard/lenovo/g505s/smihandler.c @@ -0,0 +1,106 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +/* + * SMI handler -- mostly takes care of SMIs from the EC + */ + +#include <arch/io.h> +#include <console/console.h> +#include <cpu/x86/smm.h> +#include <ec/compal/ene932/ec.h> +#include <southbridge/amd/agesa/hudson/hudson.h> +#include <southbridge/amd/agesa/hudson/smi.h> + +#include "ec.h" + +#define ACPI_PM1_CNT_SLEEP(state) ((1 << 13) | (state & 0x7) << 10) + +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. + */ + + switch (src) { + case EC_SMI_BATTERY_LOW: + printk(BIOS_DEBUG, "Battery low. Shutting down\n"); + outl(ACPI_PM1_CNT_SLEEP(S5), ACPI_PM1_CNT_BLK); + break; + default: + printk(BIOS_DEBUG, "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); +} + +static void handle_lid_smi(void) +{ + /* Only triggered in non-ACPI mode on lid close. */ + outl(ACPI_PM1_CNT_SLEEP(S4), ACPI_PM1_CNT_BLK); +} + +int mainboard_smi_apmc(uint8_t data) +{ + switch (data) { + case ACPI_SMI_CMD_ENABLE: + printk(BIOS_DEBUG, "Enable ACPI mode\n"); + ec_enter_acpi_mode(); + hudson_disable_gevent_smi(EC_LID_GEVENT); + break; + case ACPI_SMI_CMD_DISABLE: + printk(BIOS_DEBUG, "Disable ACPI mode\n"); + ec_enter_apm_mode(); + hudson_configure_gevent_smi(EC_LID_GEVENT, SMI_MODE_SMI, + SMI_LVL_LOW); + break; + default: + printk(BIOS_DEBUG, "Unhandled ACPI command: 0x%x\n", data); + } + return 0; +} + +void mainboard_smi_gpi(uint32_t gpi_sts) +{ + if (gpi_sts & (1 << EC_SMI_GEVENT)) + handle_ec_smi(); + if (gpi_sts & (1 << EC_LID_GEVENT)) + handle_lid_smi(); +} |