pmh7.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
#include <option.h>
#include <delay.h>
#include <types.h>
 
#include "pmh7.h"
#include "chip.h"
 
void pmh7_backlight_enable(int onoff)
{
        if (onoff)
                pmh7_register_set_bit(0x50, 5);
        else
                pmh7_register_clear_bit(0x50, 5);
}
 
void pmh7_dock_event_enable(int onoff)
{
        if (onoff)
                pmh7_register_set_bit(0x60, 3);
        else
                pmh7_register_clear_bit(0x60, 3);
}
 
void pmh7_touchpad_enable(int onoff)
{
        if (onoff)
                pmh7_register_clear_bit(0x51, 2);
        else
                pmh7_register_set_bit(0x51, 2);
}
 
void pmh7_trackpoint_enable(int onoff)
{
        if (onoff)
                pmh7_register_clear_bit(0x51, 0);
        else
                pmh7_register_set_bit(0x51, 0);
}
 
void pmh7_ultrabay_power_enable(int onoff)
{
        if (onoff)
                pmh7_register_clear_bit(0x62, 0);
        else
                pmh7_register_set_bit(0x62, 0);
}
 
void pmh7_dgpu_power_enable(int onoff)
{
        if (onoff) {
                pmh7_register_clear_bit(0x50, 7); // DGPU_RST
                pmh7_register_set_bit(0x50, 3); // DGPU_PWR
                mdelay(10);
                pmh7_register_set_bit(0x50, 7); // DGPU_RST
                mdelay(50);
        } else {
                pmh7_register_clear_bit(0x50, 7); // DGPU_RST
                udelay(100);
                pmh7_register_clear_bit(0x50, 3); // DGPU_PWR
        }
}
 
bool pmh7_dgpu_power_state(void)
{
        return (pmh7_register_read(0x50) & 0x08) == 8;
}
 
void pmh7_register_set_bit(int reg, int bit)
{
        char val;
 
        val = pmh7_register_read(reg);
        pmh7_register_write(reg, val | (1 << bit));
}
 
void pmh7_register_clear_bit(int reg, int bit)
{
        char val;
 
        val = pmh7_register_read(reg);
        pmh7_register_write(reg, val & ~(1 << bit));
}
 
char pmh7_register_read(int reg)
{
        outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
        outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
        return inb(EC_LENOVO_PMH7_DATA);
}
 
void pmh7_register_write(int reg, int val)
{
        outb(reg & 0xff, EC_LENOVO_PMH7_ADDR_L);
        outb((reg & 0xff00) >> 8, EC_LENOVO_PMH7_ADDR_H);
        outb(val, EC_LENOVO_PMH7_DATA);
}
 
static void enable_dev(struct device *dev)
{
        const struct ec_lenovo_pmh7_config *conf = dev->chip_info;
        struct resource *resource;
 
        resource = new_resource(dev, EC_LENOVO_PMH7_INDEX);
        resource->flags = IORESOURCE_IO | IORESOURCE_FIXED;
        resource->base = EC_LENOVO_PMH7_BASE;
        resource->size = 16;
        resource->align = 5;
        resource->gran = 5;
 
        pmh7_backlight_enable(conf->backlight_enable);
        pmh7_dock_event_enable(conf->dock_event_enable);
 
        pmh7_touchpad_enable(get_uint_option("touchpad", 1));
 
        pmh7_trackpoint_enable(get_uint_option("trackpoint", 1));
 
        printk(BIOS_INFO, "PMH7: ID %02x Revision %02x\n",
               pmh7_register_read(EC_LENOVO_PMH7_REG_ID),
               pmh7_register_read(EC_LENOVO_PMH7_REG_REV));
}
 
struct chip_operations ec_lenovo_pmh7_ops = {
        CHIP_NAME("Lenovo Power Management Hardware Hub 7")
        .enable_dev = enable_dev,
};