src/superio/ite/it8728f/it8728f_hwm.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  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 <arch/io.h>
  18 #include <console/console.h>
  19 #include <device/device.h>
  20 #include <device/pnp.h>
  21 #include "chip.h"
  22 #include "it8728f_internal.h"
  23
  24 /*
  25  * FAN controller configuration register index's
  26  */
  27 #define HWM_MAIN_CTL_REG                 0x13   /* default 0x07 */
  28 #define HWM_CTL_REG                      0x14   /* default 0x40 */
  29 #define HWM_FAN1_CTL_PWM                 0x15   /* default 0x00 */
  30 #define HWM_FAN2_CTL_PWM                 0x16   /* default 0x00 */
  31 #define HWM_FAN3_CTL_PWM                 0x17   /* default 0x00 */
  32 #define HWM_ADC_TEMP_CHAN_EN_REG 0x51   /* default 0x00 */
  33
  34 void it8728f_hwm_ec_init(struct device *dev)
  35 {
  36         struct superio_ite_it8728f_config *conf = dev->chip_info;
  37         struct resource *res = find_resource(dev, PNP_IDX_IO0);
  38
  39         if (!res) {
  40                 printk(BIOS_WARNING, "Super I/O HWM: No HWM resource found.\n");
  41                 return;
  42         }
  43         /* I/O port for HWM is at base + 5 */
  44         u16 port = res->base + 5;
  45
  46         printk(BIOS_INFO,
  47                 "ITE IT8728F Super I/O HWM: Initializing Hardware Monitor..\n");
  48         printk(BIOS_DEBUG,
  49                 "ITE IT8728F Super I/O HWM: Base Address at 0x%x\n", port);
  50
  51         pnp_enter_conf_mode(dev);
  52         pnp_set_logical_device(dev);
  53
  54         /* ITE IT8728F HWM (ordered) programming sequence. */
  55
  56         /* configure fan polarity */
  57         pnp_write_index(port, HWM_CTL_REG, conf->hwm_ctl_register);
  58
  59         /* enable fans 1-3 */
  60         pnp_write_index(port, HWM_MAIN_CTL_REG, conf->hwm_main_ctl_register);
  61
  62         /* enable termistor temps for temp1-temp3 */
  63         pnp_write_index(port, HWM_ADC_TEMP_CHAN_EN_REG, conf->hwm_adc_temp_chan_en_reg);
  64
  65         /* configure which fanX uses which tempY */
  66         pnp_write_index(port, HWM_FAN1_CTL_PWM, conf->hwm_fan1_ctl_pwm);
  67         pnp_write_index(port, HWM_FAN2_CTL_PWM, conf->hwm_fan2_ctl_pwm);
  68         pnp_write_index(port, HWM_FAN3_CTL_PWM, conf->hwm_fan3_ctl_pwm);
  69
  70         pnp_exit_conf_mode(dev);
  71 }