| /* 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; |
| } |
| |
| static void mainboard_smi_dock_connect(void) |
| { |
| /* 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()) |
| return; |
| |
| 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); |
| } |
| } |
| |
| static void mainboard_smi_dock_disconnect(void) |
| { |
| dock_disconnect(); |
| ec_write(0x0c, 0x09); |
| ec_write(0x0c, 0x08); |
| } |
| |
| int mainboard_io_trap_handler(int smif) |
| { |
| switch (smif) { |
| case SMI_DOCK_CONNECT: |
| mainboard_smi_dock_connect(); |
| break; |
| |
| case SMI_DOCK_DISCONNECT: |
| mainboard_smi_dock_disconnect(); |
| 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_smi_dock_disconnect(); |
| break; |
| /* dock event */ |
| case 0x37: |
| mainboard_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; |
| } |