2 * Legacy COM port devices for x86 platforms without PNPBIOS or ACPI.
3 * Data taken from include/asm-i386/serial.h.
5 * (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
6 * Bjorn Helgaas <bjorn.helgaas@hp.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/pnp.h>
15 #include <linux/serial_8250.h>
17 /* Standard COM flags (except for COM4, because of the 8514 problem) */
18 #ifdef CONFIG_SERIAL_DETECT_IRQ
19 #define COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ)
20 #define COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ)
22 #define COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST)
23 #define COM4_FLAGS UPF_BOOT_AUTOCONF
26 #define PORT(_base,_irq,_flags) \
31 .iotype = UPIO_PORT, \
35 static struct plat_serial8250_port x86_com_data
[] = {
36 PORT(0x3F8, 4, COM_FLAGS
),
37 PORT(0x2F8, 3, COM_FLAGS
),
38 PORT(0x3E8, 4, COM_FLAGS
),
39 PORT(0x2E8, 3, COM4_FLAGS
),
43 static struct platform_device x86_com_device
= {
45 .id
= PLAT8250_DEV_PLATFORM
,
47 .platform_data
= x86_com_data
,
51 static int force_legacy_probe
;
52 module_param_named(force
, force_legacy_probe
, bool, 0);
53 MODULE_PARM_DESC(force
, "Force legacy serial port probe");
55 static int __init
serial8250_x86_com_init(void)
57 if (pnp_platform_devices
&& !force_legacy_probe
)
60 return platform_device_register(&x86_com_device
);
63 module_init(serial8250_x86_com_init
);
65 MODULE_AUTHOR("Bjorn Helgaas");
66 MODULE_LICENSE("GPL");
67 MODULE_DESCRIPTION("Generic 8250/16x50 legacy probe module");