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GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

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lai
2026-09-06 03:52:57 +08:00
commit b1928b41c0
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source/bootloader/u-boot-2020.01/drivers/misc/smsc_lpc47m.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
*/
#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);
}