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/* 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;
}
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