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