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For some 8250 port types, we used to check the type of the port, and then determine whether the chip revision means the device is buggy. Instead, introduce a bit array, and set the appropriate bit(s) when we discover a buggy device. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
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* linux/drivers/char/8250.h
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*
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* Driver for 8250/16550-type serial ports
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*
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* Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o.
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*
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* Copyright (C) 2001 Russell King.
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* $Id: 8250.h,v 1.8 2002/07/21 21:32:30 rmk Exp $
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*/
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#include <linux/config.h>
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int serial8250_register_port(struct uart_port *);
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void serial8250_unregister_port(int line);
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void serial8250_suspend_port(int line);
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void serial8250_resume_port(int line);
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struct old_serial_port {
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unsigned int uart;
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unsigned int baud_base;
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unsigned int port;
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unsigned int irq;
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unsigned int flags;
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unsigned char hub6;
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unsigned char io_type;
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unsigned char *iomem_base;
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unsigned short iomem_reg_shift;
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};
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/*
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* This replaces serial_uart_config in include/linux/serial.h
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*/
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struct serial8250_config {
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const char *name;
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unsigned short fifo_size;
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unsigned short tx_loadsz;
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unsigned char fcr;
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unsigned int flags;
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};
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#define UART_CAP_FIFO (1 << 8) /* UART has FIFO */
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#define UART_CAP_EFR (1 << 9) /* UART has EFR */
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#define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */
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#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */
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#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */
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#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */
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#if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
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#define _INLINE_ inline
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#else
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#define _INLINE_
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#endif
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#define PROBE_RSA (1 << 0)
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#define PROBE_ANY (~0)
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#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
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#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
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#define SERIAL8250_SHARE_IRQS 1
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#else
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#define SERIAL8250_SHARE_IRQS 0
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#endif
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#if defined(__alpha__) && !defined(CONFIG_PCI)
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/*
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* Digital did something really horribly wrong with the OUT1 and OUT2
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* lines on at least some ALPHA's. The failure mode is that if either
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* is cleared, the machine locks up with endless interrupts.
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*/
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#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1)
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#elif defined(CONFIG_SBC8560)
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/*
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* WindRiver did something similarly broken on their SBC8560 board. The
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* UART tristates its IRQ output while OUT2 is clear, but they pulled
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* the interrupt line _up_ instead of down, so if we register the IRQ
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* while the UART is in that state, we die in an IRQ storm. */
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#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2)
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#else
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#define ALPHA_KLUDGE_MCR 0
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#endif
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