| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * $Id: 8250.h,v 1.8 2002/07/21 21:32:30 rmk Exp $ |
| 16 | */ |
| 17 | |
| 18 | #include <linux/config.h> |
| 19 | |
| 20 | int serial8250_register_port(struct uart_port *); |
| 21 | void serial8250_unregister_port(int line); |
| 22 | void serial8250_suspend_port(int line); |
| 23 | void serial8250_resume_port(int line); |
| 24 | |
| 25 | struct old_serial_port { |
| 26 | unsigned int uart; |
| 27 | unsigned int baud_base; |
| 28 | unsigned int port; |
| 29 | unsigned int irq; |
| 30 | unsigned int flags; |
| 31 | unsigned char hub6; |
| 32 | unsigned char io_type; |
| 33 | unsigned char *iomem_base; |
| 34 | unsigned short iomem_reg_shift; |
| 35 | }; |
| 36 | |
| 37 | /* |
| 38 | * This replaces serial_uart_config in include/linux/serial.h |
| 39 | */ |
| 40 | struct serial8250_config { |
| 41 | const char *name; |
| 42 | unsigned short fifo_size; |
| 43 | unsigned short tx_loadsz; |
| 44 | unsigned char fcr; |
| 45 | unsigned int flags; |
| 46 | }; |
| 47 | |
| 48 | #define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ |
| 49 | #define UART_CAP_EFR (1 << 9) /* UART has EFR */ |
| 50 | #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ |
| 51 | #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ |
| 52 | #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ |
| 53 | |
| Russell King | 4ba5e35 | 2005-06-23 10:43:04 +0100 | [diff] [blame^] | 54 | #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ |
| 55 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | #if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486)) |
| 57 | #define _INLINE_ inline |
| 58 | #else |
| 59 | #define _INLINE_ |
| 60 | #endif |
| 61 | |
| 62 | #define PROBE_RSA (1 << 0) |
| 63 | #define PROBE_ANY (~0) |
| 64 | |
| 65 | #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) |
| 66 | |
| 67 | #ifdef CONFIG_SERIAL_8250_SHARE_IRQ |
| 68 | #define SERIAL8250_SHARE_IRQS 1 |
| 69 | #else |
| 70 | #define SERIAL8250_SHARE_IRQS 0 |
| 71 | #endif |
| 72 | |
| 73 | #if defined(__alpha__) && !defined(CONFIG_PCI) |
| 74 | /* |
| 75 | * Digital did something really horribly wrong with the OUT1 and OUT2 |
| 76 | * lines on at least some ALPHA's. The failure mode is that if either |
| 77 | * is cleared, the machine locks up with endless interrupts. |
| 78 | */ |
| 79 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) |
| 80 | #elif defined(CONFIG_SBC8560) |
| 81 | /* |
| 82 | * WindRiver did something similarly broken on their SBC8560 board. The |
| 83 | * UART tristates its IRQ output while OUT2 is clear, but they pulled |
| 84 | * the interrupt line _up_ instead of down, so if we register the IRQ |
| 85 | * while the UART is in that state, we die in an IRQ storm. */ |
| 86 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2) |
| 87 | #else |
| 88 | #define ALPHA_KLUDGE_MCR 0 |
| 89 | #endif |