src/mainboard/lenovo/x60/smihandler.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/io.h>
   4 #include <device/pci_ops.h>
   5 #include <console/console.h>
   6 #include <cpu/x86/smm.h>
   7 #include <soc/nvs.h>
   8 #include <southbridge/intel/common/pmutil.h>
   9 #include <ec/acpi/ec.h>
  10 #include <option.h>
  11 #include <ec/lenovo/h8/h8.h>
  12 #include <delay.h>
  13 #include "dock.h"
  14 #include "smi.h"
  15
  16 #define GPE_EC_SCI      12
  17
  18 static void mainboard_smi_save_cmos(void)
  19 {
  20         u8 tmp70, tmp72;
  21
  22         tmp70 = inb(0x70);
  23         tmp72 = inb(0x72);
  24
  25         set_uint_option("tft_brightness", pci_read_config8(PCI_DEV(0, 2, 1), 0xf4));
  26         set_uint_option("volume", ec_read(H8_VOLUME_CONTROL));
  27
  28         outb(tmp70, 0x70);
  29         outb(tmp72, 0x72);
  30 }
  31
  32 int mainboard_io_trap_handler(int smif)
  33 {
  34         switch (smif) {
  35         case SMI_DOCK_CONNECT:
  36                 ec_clr_bit(0x03, 2);
  37                 mdelay(250);
  38                 if (!dock_connect()) {
  39                         ec_set_bit(0x03, 2);
  40                         /* set dock LED to indicate status */
  41                         ec_write(0x0c, 0x09);
  42                         ec_write(0x0c, 0x88);
  43                 } else {
  44                         /* blink dock LED to indicate failure */
  45                         ec_write(0x0c, 0x08);
  46                         ec_write(0x0c, 0xc9);
  47                 }
  48                 break;
  49
  50         case SMI_DOCK_DISCONNECT:
  51                 ec_clr_bit(0x03, 2);
  52                 dock_disconnect();
  53                 break;
  54
  55         case SMI_SAVE_CMOS:
  56                 mainboard_smi_save_cmos();
  57                 break;
  58         default:
  59                 return 0;
  60         }
  61
  62         /* On success, the IO Trap Handler returns 1
  63          * On failure, the IO Trap Handler returns a value != 1 */
  64         return 1;
  65 }
  66
  67 static void mainboard_smi_brightness_up(void)
  68 {
  69         u8 value;
  70
  71         if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) < 0xf0)
  72                 pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value + 0x10) | 0xf);
  73 }
  74
  75 static void mainboard_smi_brightness_down(void)
  76 {
  77         u8 value;
  78
  79         if ((value = pci_read_config8(PCI_DEV(0, 2, 1), 0xf4)) > 0x10)
  80                 pci_write_config8(PCI_DEV(0, 2, 1), 0xf4, (value - 0x10) & 0xf0);
  81 }
  82
  83 static void mainboard_smi_handle_ec_sci(void)
  84 {
  85         u8 status = inb(EC_SC);
  86         u8 event;
  87
  88         if (!(status & EC_SCI_EVT))
  89                 return;
  90
  91         event = ec_query();
  92         printk(BIOS_DEBUG, "EC event %#02x\n", event);
  93
  94         switch (event) {
  95                 /* brightness up */
  96                 case 0x14:
  97                         mainboard_smi_brightness_up();
  98                         mainboard_smi_save_cmos();
  99                         break;
 100                 /* brightness down */
 101                 case 0x15:
 102                         mainboard_smi_brightness_down();
 103                         mainboard_smi_save_cmos();
 104                         break;
 105                         /* Fn-F9 key */
 106                 case 0x18:
 107                         /* Power loss */
 108                 case 0x27:
 109                         /* Undock Key */
 110                 case 0x50:
 111                         mainboard_io_trap_handler(SMI_DOCK_DISCONNECT);
 112                         break;
 113                         /* Dock Event */
 114                 case 0x37:
 115                 case 0x58:
 116                         mainboard_io_trap_handler(SMI_DOCK_CONNECT);
 117                         break;
 118                 default:
 119                         break;
 120         }
 121 }
 122
 123 void mainboard_smi_gpi(u32 gpi)
 124 {
 125         if (gpi & (1 << GPE_EC_SCI))
 126                 mainboard_smi_handle_ec_sci();
 127 }
 128
 129 int mainboard_smi_apmc(u8 data)
 130 {
 131         switch (data) {
 132                 case APM_CNT_ACPI_ENABLE:
 133                         /* use 0x1600/0x1604 to prevent races with userspace */
 134                         ec_set_ports(0x1604, 0x1600);
 135                         /* route H8SCI to SCI */
 136                         gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SCI);
 137                         /* discard all events, and enable attention */
 138                         ec_write(0x80, 0x01);
 139                         break;
 140                 case APM_CNT_ACPI_DISABLE:
 141                         /* we have to use port 0x62/0x66, as 0x1600/0x1604 doesn't
 142                            provide a EC query function */
 143                         ec_set_ports(0x66, 0x62);
 144                         /* route H8SCI# to SMI */
 145                         gpi_route_interrupt(GPE_EC_SCI, GPI_IS_SMI);
 146                         /* discard all events, and enable attention */
 147                         ec_write(0x80, 0x01);
 148                         break;
 149                 default:
 150                         break;
 151         }
 152         return 0;
 153 }