src/superio/nuvoton/npcd378/superio.c

/* SPDX-License-Identifier: GPL-2.0-or-later */
/* This file is part of the coreboot project. */

#include <arch/io.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pnp.h>
#include <option.h>
#include <pc80/keyboard.h>
#include <superio/conf_mode.h>
#include <arch/acpi.h>
#include <arch/acpigen.h>

#include "npcd378.h"

uint8_t npcd378_hwm_read(const uint16_t iobase, const uint16_t reg)
{
	outb((reg >> 8) & 0xf, iobase + 0xff);
	uint8_t reg8 = inb(iobase + (reg & 0xff));
	if (reg8 == 0xff)
		reg8 = inb(iobase + (reg & 0xff));

	outb(0, iobase + 0xff);
	return reg8;
}

void npcd378_hwm_write(const uint16_t iobase, const uint16_t reg,
		       const uint8_t val)
{
	outb((reg >> 8) & 0xf, iobase + 0xff);
	outb(val, iobase + (reg & 0xff));

	outb(0, iobase + 0xff);
}

void npcd378_hwm_write_start(const uint16_t iobase)
{
	u8 reg8 = npcd378_hwm_read(iobase, NPCD837_HWM_WRITE_LOCK_CTRL);
	reg8 &= ~NPCD837_HWM_WRITE_LOCK_BIT;
	npcd378_hwm_write(iobase, NPCD837_HWM_WRITE_LOCK_CTRL, reg8);
}

void npcd378_hwm_write_finished(const uint16_t iobase)
{
	u8 reg8 = npcd378_hwm_read(iobase, NPCD837_HWM_WRITE_LOCK_CTRL);
	reg8 |= NPCD837_HWM_WRITE_LOCK_BIT;
	npcd378_hwm_write(iobase, NPCD837_HWM_WRITE_LOCK_CTRL, reg8);
}

static void npcd378_init(struct device *dev)
{
	struct resource *res;
	uint8_t pwm, fan_lvl;

	if (!dev->enabled)
		return;

	switch (dev->path.pnp.device) {
	/* TODO: Might potentially need code for FDC etc. */
	case NPCD378_KBC:
		pc_keyboard_init(PROBE_AUX_DEVICE);
		break;
	case NPCD378_HWM:
		res = find_resource(dev, PNP_IDX_IO0);
		if (!res || !res->base) {
			printk(BIOS_ERR, "NPCD378: LDN%u IOBASE not set.\n",
			       NPCD378_HWM);
			break;
		}

		npcd378_hwm_write_start(res->base);

		if (!get_option(&fan_lvl, "psu_fan_lvl") || fan_lvl > 7)
			fan_lvl = 3;

		pwm = NPCD378_HWM_PSU_FAN_MIN +
		    (NPCD378_HWM_PSU_FAN_MAX - NPCD378_HWM_PSU_FAN_MIN) *
		    fan_lvl / 7;

		/* Set PSU fan PWM lvl */
		npcd378_hwm_write(res->base, NPCD378_HWM_PSU_FAN_PWM_CTRL, pwm);
		printk(BIOS_INFO, "NPCD378: PSU fan PWM 0x%02x\n", pwm);

		npcd378_hwm_write_finished(res->base);
		break;
	}
}

#if CONFIG(HAVE_ACPI_TABLES)
static void npcd378_ssdt(struct device *dev)
{
	struct resource *res;

	const char *scope = acpi_device_path(dev);
	if (!scope) {
		printk(BIOS_ERR, "%s: Missing ACPI scope\n", dev_path(dev));
		return;
	}

	switch (dev->path.pnp.device) {
	case NPCD378_PWR: {
		res = find_resource(dev, PNP_IDX_IO0);
		if (!res || !res->base) {
			printk(BIOS_ERR, "NPCD378: LDN%u IOBASE not set.\n",
			       NPCD378_PWR);
			break;
		}

		acpigen_write_scope(scope);
		acpigen_write_name_integer("SWB", res->base);
		acpigen_write_name_integer("SWL", res->size);
		acpigen_pop_len(); /* pop scope */

		res = find_resource(dev, PNP_IDX_IO1);
		if (!res || !res->base) {
			printk(BIOS_ERR, "NPCD378: LDN%u IOBASE2 not set.\n",
			       NPCD378_PWR);
			break;
		}

		acpigen_write_scope(scope);
		acpigen_write_name_integer("RNB", res->base);
		acpigen_write_name_integer("RNL", res->size);
		acpigen_pop_len(); /* pop scope */
		break;
	}
	}
}

static const char *npcd378_acpi_name(const struct device *dev)
{
	return "SIO0";
}
#endif

static struct device_operations ops = {
	.read_resources   = pnp_read_resources,
	.set_resources    = pnp_set_resources,
	.enable_resources = pnp_enable_resources,
	.enable           = pnp_alt_enable,
	.init             = npcd378_init,
	.ops_pnp_mode     = &pnp_conf_mode_8787_aa,
#if CONFIG(HAVE_ACPI_TABLES)
	.acpi_fill_ssdt_generator = npcd378_ssdt,
	.acpi_name = npcd378_acpi_name,
#endif
};

static struct pnp_info pnp_dev_info[] = {
	{ NULL, NPCD378_FDC, PNP_IO0|PNP_IRQ0|PNP_DRQ0, 0x0ff8, },
	{ NULL, NPCD378_PP, PNP_IO0|PNP_IRQ0|PNP_DRQ0, 0x0ff8, },
	{ NULL, NPCD378_SP1, PNP_IO0|PNP_IRQ0, 0x0ff8, },
	{ NULL, NPCD378_SP2, PNP_IO0|PNP_IRQ0, 0x0ff8, },
	{ NULL, NPCD378_PWR, PNP_IO0|PNP_IO1|PNP_IRQ0|PNP_MSC0|
		PNP_MSC1|PNP_MSC2|PNP_MSC3|PNP_MSC4|PNP_MSC5|PNP_MSC6|PNP_MSC7|
		PNP_MSC8|PNP_MSC9|PNP_MSCA|PNP_MSCB|PNP_MSCC|PNP_MSCD|PNP_MSCE,
		0x0ff8, 0x0ff0},
	{ NULL, NPCD378_AUX, PNP_IRQ0, 0x0fff, 0x0fff, },
	{ NULL, NPCD378_KBC, PNP_IO0|PNP_IO1|PNP_IRQ0,
		0x0fff, 0x0fff, },
	{ NULL, NPCD378_WDT1, PNP_IO0|PNP_MSC8|PNP_MSC9|
		PNP_MSCA|PNP_MSCB|PNP_MSCC|PNP_MSCD|PNP_MSCE, 0x0fe0},
	{ NULL, NPCD378_HWM, PNP_IO0|PNP_MSC0|PNP_MSC1|PNP_MSC2|PNP_MSC3|
		PNP_MSC4|PNP_MSC5|PNP_MSC6|PNP_MSC7|PNP_IRQ0, 0x0f00},
	{ NULL, NPCD378_GPIO_PP_OD, PNP_MSC0|PNP_MSC1|PNP_MSC2|PNP_MSC3|
		PNP_MSC4|PNP_MSC5|PNP_MSC6|PNP_MSC7|PNP_MSC8|PNP_MSC9|PNP_MSCA|
		PNP_MSCB|PNP_MSCC|PNP_MSCD|PNP_MSCE},
	{ NULL, NPCD378_I2C, PNP_IO0|PNP_IO1|PNP_IRQ0|PNP_MSC0|
		PNP_MSC1|PNP_MSC2|PNP_MSC3|PNP_MSC4|PNP_MSC5|PNP_MSC6|PNP_MSC7|
		PNP_MSC8|PNP_MSC9|PNP_MSCA|PNP_MSCB|PNP_MSCC|PNP_MSCD|PNP_MSCE,
		0x0ff0, 0x0ff0},
	{ NULL, NPCD378_SUSPEND, PNP_IO0, 0x0fe0 },
	{ NULL, NPCD378_GPIOA, PNP_IO0|PNP_MSC0|PNP_MSC1|PNP_MSC2|PNP_MSC3|
		PNP_MSC4, 0x0fe0},
};

static void enable_dev(struct device *dev)
{
	pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info);
}

struct chip_operations superio_nuvoton_npcd378_ops = {
	CHIP_NAME("NUVOTON NPCD378 Super I/O")
	.enable_dev = enable_dev,
};