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/*
* Legacy COM port devices for x86 platforms without PNPBIOS or ACPI.
* Data taken from include/asm-i386/serial.h.
*
* (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
* Bjorn Helgaas <bjorn.helgaas@hp.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pnp.h>
#include <linux/serial_8250.h>
/* Standard COM flags (except for COM4, because of the 8514 problem) */
#ifdef CONFIG_SERIAL_DETECT_IRQ
#define COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ)
#define COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ)
#else
#define COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST)
#define COM4_FLAGS UPF_BOOT_AUTOCONF
#endif
#define PORT(_base,_irq,_flags) \
{ \
.iobase = _base, \
.irq = _irq, \
.uartclk = 1843200, \
.iotype = UPIO_PORT, \
.flags = _flags, \
}
static struct plat_serial8250_port x86_com_data[] = {
PORT(0x3F8, 4, COM_FLAGS),
PORT(0x2F8, 3, COM_FLAGS),
PORT(0x3E8, 4, COM_FLAGS),
PORT(0x2E8, 3, COM4_FLAGS),
{ },
};
static struct platform_device x86_com_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = x86_com_data,
},
};
static int force_legacy_probe;
module_param_named(force, force_legacy_probe, bool, 0);
MODULE_PARM_DESC(force, "Force legacy serial port probe");
static int __init serial8250_x86_com_init(void)
{
if (pnp_platform_devices && !force_legacy_probe)
return -ENODEV;
return platform_device_register(&x86_com_device);
}
module_init(serial8250_x86_com_init);
MODULE_AUTHOR("Bjorn Helgaas");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Generic 8250/16x50 legacy probe module");
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