/* SPDX-License-Identifier: GPL-2.0-only */ #include <arch/io.h> #include <device/pci_ops.h> #include <console/console.h> #include <cpu/x86/smm.h> #include <ec/acpi/ec.h> #include <ec/lenovo/h8/h8.h> #include <southbridge/intel/lynxpoint/pch.h> #define GPE_EC_SCI 1 #define GPE_EC_WAKE 13 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); } void mainboard_smi_gpi(u32 gpi_sts) { if (gpi_sts & (1 << GPE_EC_SCI)) mainboard_smi_handle_ec_sci(); } /* lynxpoint doesn't have gpi_route_interrupt, so add it */ #define GPI_DISABLE 0x00 #define GPI_IS_SMI 0x01 #define GPI_IS_SCI 0x02 #define GPI_IS_NMI 0x03 static void gpi_route_interrupt(u8 gpi, u8 mode) { u32 gpi_rout; gpi_rout = pci_read_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT); gpi_rout &= ~(3 << (2 * gpi)); gpi_rout |= ((mode & 3) << (2 * gpi)); pci_write_config32(PCI_DEV(0, 0x1f, 0), GPIO_ROUT, gpi_rout); } 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 EC_SCI to SCI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI); /* discard all events, and enable attention */ ec_write(0x80, 0x01); 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 EC_SCI to SMI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI); /* discard all events, and enable attention */ ec_write(0x80, 0x01); break; default: break; } return 0; } void mainboard_smi_sleep(u8 slp_typ) { if (slp_typ == 3) { u8 ec_wake = ec_read(0x32); /* If EC wake events are enabled, * enable wake on EC WAKE GPE. */ if (ec_wake & 0x14) { /* Redirect EC WAKE GPE to SCI. */ gpi_route_interrupt(GPE_EC_WAKE, GPI_IS_SCI); } } }