src/ec/lenovo/pmh7/pmh7.c

/* 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->base = EC_LENOVO_PMH7_BASE;
	resource->size = 16;
	resource->align = 5;
	resource->gran = 5;
	resource->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_ASSIGNED;

	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 = {
	.name = "Lenovo Power Management Hardware Hub 7",
	.enable_dev = enable_dev,
};