1/* 2 * linux/drivers/char/8250.h 3 * 4 * Driver for 8250/16550-type serial ports 5 * 6 * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. 7 * 8 * Copyright (C) 2001 Russell King. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 */ 15 16#include <linux/serial_8250.h> 17 18struct old_serial_port { 19 unsigned int uart; 20 unsigned int baud_base; 21 unsigned int port; 22 unsigned int irq; 23 unsigned int flags; 24 unsigned char hub6; 25 unsigned char io_type; 26 unsigned char *iomem_base; 27 unsigned short iomem_reg_shift; 28 unsigned long irqflags; 29}; 30 31/* 32 * This replaces serial_uart_config in include/linux/serial.h 33 */ 34struct serial8250_config { 35 const char *name; 36 unsigned short fifo_size; 37 unsigned short tx_loadsz; 38 unsigned char fcr; 39 unsigned int flags; 40}; 41 42#define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ 43#define UART_CAP_EFR (1 << 9) /* UART has EFR */ 44#define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ 45#define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ 46#define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ 47 48#define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ 49#define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ 50#define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ 51#define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */ 52 53#define PROBE_RSA (1 << 0) 54#define PROBE_ANY (~0) 55 56#define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) 57 58#ifdef CONFIG_SERIAL_8250_SHARE_IRQ 59#define SERIAL8250_SHARE_IRQS 1 60#else 61#define SERIAL8250_SHARE_IRQS 0 62#endif 63 64#if defined(__alpha__) && !defined(CONFIG_PCI) 65/* 66 * Digital did something really horribly wrong with the OUT1 and OUT2 67 * lines on at least some ALPHA's. The failure mode is that if either 68 * is cleared, the machine locks up with endless interrupts. 69 */ 70#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) 71#elif defined(CONFIG_SBC8560) 72/* 73 * WindRiver did something similarly broken on their SBC8560 board. The 74 * UART tristates its IRQ output while OUT2 is clear, but they pulled 75 * the interrupt line _up_ instead of down, so if we register the IRQ 76 * while the UART is in that state, we die in an IRQ storm. */ 77#define ALPHA_KLUDGE_MCR (UART_MCR_OUT2) 78#else 79#define ALPHA_KLUDGE_MCR 0 80#endif 81