fanctl.c

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#include <arch/io.h>
#include <stdlib.h>

static void write_index(uint16_t port_base, uint8_t reg, uint8_t value)
{
        outb(reg, port_base);
        outb(value, port_base + 1);
}

static const struct {
        uint8_t index, value;
} sequence[]= {
        /* Make sure we can monitor, and enable SMI# interrupt output */
        { 0x00, 0x13},
        /* Disable fan interrupt status bits for SMI# */
        { 0x04, 0x37},
        /* Disable VIN interrupt status bits for SMI# */
        { 0x05, 0xff},
        /* Disable fan interrupt status bits for IRQ */
        { 0x07, 0x37},
        /* Disable VIN interrupt status bits for IRQ */
        { 0x08, 0xff},
        /* Disable external sensor interrupt */
        { 0x09, 0x87},
        /* Enable 16 bit counter divisors */
        { 0x0c, 0x07},
        /* Set FAN_CTL control register (0x14) polarity to high, and
           activate fans 1, 2 and 3. */
        { 0x14, 0xd7},
        /* set the correct sensor types 1,2 thermistor; 3 diode */
        { 0x51, 0x1c},
        /* set the 'zero' voltage for diode type sensor 3 */
        { 0x5c, 0x80},
//      { 0x56, 0xe5},
//      { 0x57, 0xe5},
        { 0x59, 0xec},
        { 0x5c, 0x00},
        /* fan1 (controlled by temp3) control parameters */
        /* fan off limit */
        { 0x60, 0xff},
        /* fan start limit */
        { 0x61, 0x14},
        /* ???? */
//      { 0x62, 0x00},
        /* start PWM */
        { 0x63, 0x27},
        /* smooth and slope PWM */
        { 0x64, 0x90},
        /* direct-down and interval */
        { 0x65, 0x03},
        /* temperature limit of fan stop for fan3 (automatic) */
        { 0x70, 0xff},
        /* temperature limit of fan start for fan3 (automatic) */
        { 0x71, 0x14},
        /* Set PWM start & slope for fan3 */
        { 0x73, 0x20},
        /* Initialize PWM automatic mode slope values for fan3 */
        { 0x74, 0x90},
        /* set smartguardian temperature interval for fan3 */
        { 0x75, 0x03},
        /* fan1 auto controlled by temp3 */
        { 0x15, 0x82},
        /* fan2 auto controlled by temp3 */
        { 0x16, 0x82},
        /* fan3 auto controlled by temp3 */
        { 0x17, 0x82},
        /* all fans enable, fan1 ctl smart */
        { 0x13, 0x77}
};

/*
 * Called from superio.c
 */
void init_ec(uint16_t base)
{
        int i;
        for (i=0; i<ARRAY_SIZE(sequence); i++) {
                write_index(base, sequence[i].index, sequence[i].value);
        }
}

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