| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #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); |
| } |
| } |
| } |