X60: handle EC events in SMM if ACPI is disabled

[coreboot.git] / src / mainboard / lenovo / x60 / mainboard_smi.c

diff --git a/src/mainboard/lenovo/x60/mainboard_smi.c b/src/mainboard/lenovo/x60/mainboard_smi.c
index 769432f618565da08edfb003647ac3972cd8c350..fd10c9a9a40a137f86b5db1714e1c73ce761668a 100644 (file)
--- a/src/mainboard/lenovo/x60/mainboard_smi.c
+++ b/src/mainboard/lenovo/x60/mainboard_smi.c
@@ -24,6 +24,7 @@
 #include <console/console.h>
 #include <cpu/x86/smm.h>
 #include "southbridge/intel/i82801gx/nvs.h"
+#include "southbridge/intel/i82801gx/i82801gx.h"
 #include <ec/acpi/ec.h>
 #include <pc80/mc146818rtc.h>
 #include <ec/lenovo/h8/h8.h>
@@ -98,3 +99,94 @@ int mainboard_io_trap_handler(int smif)
         * On failure, the IO Trap Handler returns a value != 1 */
        return 1;
 }
+
+static void mainboard_smi_brightness_up(void)
+{
+       u8 value;
+
+       if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) < 0xf0)
+               pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value + 0x10) | 0xf);
+}
+
+static void mainboard_smi_brightness_down(void)
+{
+       u8 value;
+
+       if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) > 0x10)
+               pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value - 0x10) & 0xf0);
+}
+
+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();
+                       mainboard_smi_save_cmos();
+                       break;
+               /* brightness down */
+               case 0x15:
+                       mainboard_smi_brightness_down();
+                       mainboard_smi_save_cmos();
+                       break;
+               default:
+                       break;
+       }
+}
+
+void mainboard_smi_gpi(u16 gpi)
+{
+       if (gpi & (1 << 12))
+               mainboard_smi_handle_ec_sci();
+}
+
+int mainboard_apm_cnt(u8 data)
+{
+       u16 pmbase = pci_read_config16(PCI_DEV(0, 0x1f, 0), 0x40) & 0xfffc;
+       u8 tmp;
+
+       printk(BIOS_DEBUG, "%s: pmbase %04X, data %02X\n", __func__, pmbase, data);
+
+       if (!pmbase)
+               return 0;
+
+       switch(data) {
+               case APM_CNT_ACPI_ENABLE:
+                       /* use 0x1600/0x1604 to prevent races with userspace */
+                       ec_set_ports(0x1604, 0x1600);
+                       /* route H8SCI to SCI */
+                       outw(inw(ALT_GP_SMI_EN) & ~0x1000, pmbase + ALT_GP_SMI_EN);
+                       tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb);
+                       tmp &= ~0x03;
+                       tmp |= 0x02;
+                       pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp);
+                       /* 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 H8SCI# to SMI */
+                       outw(inw(pmbase + ALT_GP_SMI_EN) | 0x1000, pmbase + ALT_GP_SMI_EN);
+                       tmp = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xbb);
+                       tmp &= ~0x03;
+                       tmp |= 0x01;
+                       pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xbb, tmp);
+                       /* discard all events, and enable attention */
+                       ec_write(0x80, 0x01);
+                       break;
+               default:
+                       break;
+       }
+       return 0;
+}