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/* SPDX-License-Identifier: GPL-2.0-only */
#include <arch/io.h>
#include <device/pnp.h>
#include <device/pnp_def.h>
#include <device/pnp_ops.h>
#include <superio/smsc/ece5048/ece5048.h>
static void pnp_enter_conf_state(pnp_devfn_t dev)
{
unsigned int port = dev >> 8;
outb(0x55, port);
}
static void pnp_exit_conf_state(pnp_devfn_t dev)
{
unsigned int port = dev >> 8;
outb(0xaa, port);
}
// both E6230 and E7240 uses port 0x94e
void ece5048_early_init(u16 port)
{
pnp_devfn_t dev;
outb(0x55, port);
outb(0x55, port);
pnp_write_config(port << 8, 0x22, 0x10);
pnp_write_config(port << 8, 0x23, 0x10);
pnp_write_config(port << 8, 0x24, 4);
pnp_write_config(port << 8, 0x25, 4);
dev = PNP_DEV(port, 3);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
dev = PNP_DEV(port, 12);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1);
pnp_set_iobase(dev, PNP_IDX_IO0, 0x928); // is it for all laptops?
outb(0xaa, port);
}
/* FIXME: XXX this should be used in ramstage/smm? */
/* TODO: use 4e/4f in ACPI? */
void ece5048_enable_serial(pnp_devfn_t dev, u16 iobase)
{
pnp_enter_conf_state(dev);
pnp_write_config(dev, 0x22, pnp_read_config(dev, 0x22) | 0x10);
pnp_write_config(dev, 0x23, pnp_read_config(dev, 0x23) | 0x10);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_irq(dev, PNP_IDX_IRQ0, 4);
pnp_exit_conf_state(dev);
}
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