/* SPDX-License-Identifier: GPL-2.0-only */ #include <arch/io.h> #include <device/pci_ops.h> #include <device/pci_def.h> #include <console/console.h> #include <cpu/x86/smm.h> #include <soc/nvs.h> #include <southbridge/intel/common/pmutil.h> #include <ec/acpi/ec.h> #include "dock.h" #include "smi.h" #define GPE_EC_SCI 12 #define LVTMA_BL_MOD_LEVEL 0x7af9 /* ATI Radeon backlight level */ static void mainboard_smi_brightness_down(void) { uint32_t reg32 = pci_read_config32(PCI_DEV(1, 0, 0), PCI_BASE_ADDRESS_2) & ~0xf; u8 *bar = (void *)(uintptr_t)reg32; /* Validate pointer before using it */ if (!bar || smm_points_to_smram(bar, LVTMA_BL_MOD_LEVEL + sizeof(uint8_t))) return; printk(BIOS_DEBUG, "bar: %p, level %02X\n", bar, *(bar+LVTMA_BL_MOD_LEVEL)); *(bar+LVTMA_BL_MOD_LEVEL) &= 0xf0; if (*(bar+LVTMA_BL_MOD_LEVEL) > 0x10) *(bar+LVTMA_BL_MOD_LEVEL) -= 0x10; } static void mainboard_smi_brightness_up(void) { uint32_t reg32 = pci_read_config32(PCI_DEV(1, 0, 0), PCI_BASE_ADDRESS_2) & ~0xf; u8 *bar = (void *)(uintptr_t)reg32; /* Validate pointer before using it */ if (!bar || smm_points_to_smram(bar, LVTMA_BL_MOD_LEVEL + sizeof(uint8_t))) return; printk(BIOS_DEBUG, "bar: %p, level %02X\n", bar, *(bar+LVTMA_BL_MOD_LEVEL)); *(bar+LVTMA_BL_MOD_LEVEL) |= 0x0f; if (*(bar+LVTMA_BL_MOD_LEVEL) < 0xf0) *(bar+LVTMA_BL_MOD_LEVEL) += 0x10; } int mainboard_io_trap_handler(int smif) { switch (smif) { case SMI_DOCK_CONNECT: /* If there's an legacy I/O module present, we're not * allowed to connect the Docking LPC Bus, as both Super I/O * chips are using 0x2e as base address. */ if (legacy_io_present()) break; if (!dock_connect()) { /* set dock LED to indicate status */ ec_write(0x0c, 0x08); ec_write(0x0c, 0x89); } else { /* blink dock LED to indicate failure */ ec_write(0x0c, 0xc8); ec_write(0x0c, 0x09); } break; case SMI_DOCK_DISCONNECT: dock_disconnect(); ec_write(0x0c, 0x09); ec_write(0x0c, 0x08); break; case SMI_BRIGHTNESS_UP: mainboard_smi_brightness_up(); break; case SMI_BRIGHTNESS_DOWN: mainboard_smi_brightness_down(); break; default: return 0; } /* On success, the IO Trap Handler returns 1 * On failure, the IO Trap Handler returns a value != 1 */ return 1; } 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); switch (event) { /* brightness up */ case 0x14: mainboard_smi_brightness_up(); break; /* brightness down */ case 0x15: mainboard_smi_brightness_down(); break; /* Fn-F9 Key */ case 0x18: /* power loss */ case 0x27: /* undock event */ case 0x50: mainboard_io_trap_handler(SMI_DOCK_DISCONNECT); break; /* dock event */ case 0x37: mainboard_io_trap_handler(SMI_DOCK_CONNECT); break; default: break; } } void mainboard_smi_gpi(u32 gpi) { if (gpi & (1 << GPE_EC_SCI)) mainboard_smi_handle_ec_sci(); } 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 H8SCI to SCI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI); 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 H8SCI# to SMI */ gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI); break; default: break; } return 0; }