68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
|
/*
|
||
|
|
* 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");
|