u-boot/drivers/misc/smsc_lpc47m.c
Bin Meng c78dfb4fd2 x86: superio: Add keyboard controller support to smsc_lpc47m driver
Add an api to enable and configure the integrated keyboard controller
on SMSC LPC47m superio chipset. It also adds several macros to help
future extension.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-08-26 07:54:12 -07:00

45 lines
896 B
C

/*
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/io.h>
#include <asm/pnp_def.h>
static void pnp_enter_conf_state(u16 dev)
{
u16 port = dev >> 8;
outb(0x55, port);
}
static void pnp_exit_conf_state(u16 dev)
{
u16 port = dev >> 8;
outb(0xaa, port);
}
void lpc47m_enable_serial(uint dev, uint iobase, uint irq)
{
pnp_enter_conf_state(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
pnp_set_irq(dev, PNP_IDX_IRQ0, irq);
pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev);
}
void lpc47m_enable_kbc(uint dev, uint irq0, uint irq1)
{
pnp_enter_conf_state(dev);
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
pnp_set_irq(dev, PNP_IDX_IRQ0, irq0);
pnp_set_irq(dev, PNP_IDX_IRQ1, irq1);
pnp_set_enable(dev, 1);
pnp_exit_conf_state(dev);
}