src/mainboard/getac/p470/ec_oem.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2008-2009 coresystems GmbH
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; version 2 of
   9  * the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <console/console.h>
  18 #include <arch/io.h>
  19 #include <delay.h>
  20 #include <ec/acpi/ec.h>
  21 #include "ec_oem.h"
  22
  23 int send_ec_oem_command(u8 command)
  24 {
  25         int timeout;
  26
  27         timeout = 0x7ff;
  28         while ((inb(EC_OEM_SC) & EC_IBF) && --timeout) {
  29                 udelay(10);
  30                 if ((timeout & 0xff) == 0)
  31                         printk(BIOS_SPEW, ".");
  32         }
  33         if (!timeout) {
  34                 printk(BIOS_DEBUG, "Timeout while sending OEM command 0x%02x to EC!\n",
  35                                 command);
  36                 // return -1;
  37         }
  38
  39         outb(command, EC_OEM_SC);
  40         return 0;
  41 }
  42
  43 int send_ec_oem_data(u8 data)
  44 {
  45         int timeout;
  46
  47         timeout = 0x7ff;
  48         while ((inb(EC_OEM_SC) & EC_IBF) && --timeout) { // wait for IBF = 0
  49                 udelay(10);
  50                 if ((timeout & 0xff) == 0)
  51                         printk(BIOS_SPEW, ".");
  52         }
  53         if (!timeout) {
  54                 printk(BIOS_DEBUG, "Timeout while sending OEM data 0x%02x to EC!\n",
  55                                 data);
  56                 // return -1;
  57         }
  58
  59         outb(data, EC_OEM_DATA);
  60
  61         return 0;
  62 }
  63
  64 int send_ec_oem_data_nowait(u8 data)
  65 {
  66         outb(data, EC_OEM_DATA);
  67
  68         return 0;
  69 }
  70
  71 u8 recv_ec_oem_data(void)
  72 {
  73         int timeout;
  74         u8 data;
  75
  76         timeout = 0x7fff;
  77         while (--timeout) { // Wait for OBF = 1
  78                 if (inb(EC_OEM_SC) & EC_OBF) {
  79                         break;
  80                 }
  81                 udelay(10);
  82                 if ((timeout & 0xff) == 0)
  83                         printk(BIOS_SPEW, ".");
  84         }
  85         if (!timeout) {
  86                 printk(BIOS_DEBUG, "\nTimeout while receiving OEM data from EC!\n");
  87                 // return -1;
  88         }
  89
  90         data = inb(EC_OEM_DATA);
  91         // printk(BIOS_SPEW, "recv_ec_oem_data: 0x%02x\n", data);
  92
  93         return data;
  94 }
  95
  96 u8 ec_oem_read(u8 addr)
  97 {
  98         send_ec_oem_command(0x80);
  99         send_ec_oem_data(addr);
 100
 101         return recv_ec_oem_data();
 102 }
 103
 104 int ec_oem_write(u8 addr, u8 data)
 105 {
 106         send_ec_oem_command(0x81);
 107         send_ec_oem_data(addr);
 108         return send_ec_oem_data(data);
 109 }
 110
 111 int ec_oem_dump_status(void)
 112 {
 113         u8 ec_sc = inb(EC_OEM_SC);
 114         printk(BIOS_DEBUG, "Embedded Controller Status: ");
 115         if (ec_sc & (1 << 6)) printk(BIOS_DEBUG, "SMI_EVT ");
 116         if (ec_sc & (1 << 5)) printk(BIOS_DEBUG, "SCI_EVT ");
 117         if (ec_sc & (1 << 4)) printk(BIOS_DEBUG, "BURST ");
 118         if (ec_sc & (1 << 3)) printk(BIOS_DEBUG, "CMD ");
 119         if (ec_sc & (1 << 1)) printk(BIOS_DEBUG, "IBF ");
 120         if (ec_sc & (1 << 0)) printk(BIOS_DEBUG, "OBF ");
 121         printk(BIOS_DEBUG, "\n");
 122
 123         return ec_sc;
 124 }