projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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. | |
| 1da177e4 LT |
14 | */ |
| 15 | ||
| bc49a661 | 16 | #include <linux/serial_8250.h> |
| 1da177e4 LT |
17 | |
| 18 | struct 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 | }; | |
| 29 | ||
| 30 | /* | |
| 31 | * This replaces serial_uart_config in include/linux/serial.h | |
| 32 | */ | |
| 33 | struct serial8250_config { | |
| 34 | const char *name; | |
| 35 | unsigned short fifo_size; | |
| 36 | unsigned short tx_loadsz; | |
| 37 | unsigned char fcr; | |
| 38 | unsigned int flags; | |
| 39 | }; | |
| 40 | ||
| 41 | #define UART_CAP_FIFO (1 << 8) /* UART has FIFO */ | |
| 42 | #define UART_CAP_EFR (1 << 9) /* UART has EFR */ | |
| 43 | #define UART_CAP_SLEEP (1 << 10) /* UART has IER sleep */ | |
| 44 | #define UART_CAP_AFE (1 << 11) /* MCR-based hw flow control */ | |
| 45 | #define UART_CAP_UUE (1 << 12) /* UART needs IER bit 6 set (Xscale) */ | |
| 46 | ||
| 4ba5e35d | 47 | #define UART_BUG_QUOT (1 << 0) /* UART has buggy quot LSB */ |
| 55d3b282 | 48 | #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ |
| 21c614a7 | 49 | #define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ |
| 4ba5e35d | 50 | |
| 1da177e4 LT |
51 | #define PROBE_RSA (1 << 0) |
| 52 | #define PROBE_ANY (~0) | |
| 53 | ||
| 54 | #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) | |
| 55 | ||
| 56 | #ifdef CONFIG_SERIAL_8250_SHARE_IRQ | |
| 57 | #define SERIAL8250_SHARE_IRQS 1 | |
| 58 | #else | |
| 59 | #define SERIAL8250_SHARE_IRQS 0 | |
| 60 | #endif | |
| 61 | ||
| 62 | #if defined(__alpha__) && !defined(CONFIG_PCI) | |
| 63 | /* | |
| 64 | * Digital did something really horribly wrong with the OUT1 and OUT2 | |
| 65 | * lines on at least some ALPHA's. The failure mode is that if either | |
| 66 | * is cleared, the machine locks up with endless interrupts. | |
| 67 | */ | |
| 68 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2 | UART_MCR_OUT1) | |
| 69 | #elif defined(CONFIG_SBC8560) | |
| 70 | /* | |
| 71 | * WindRiver did something similarly broken on their SBC8560 board. The | |
| 72 | * UART tristates its IRQ output while OUT2 is clear, but they pulled | |
| 73 | * the interrupt line _up_ instead of down, so if we register the IRQ | |
| 74 | * while the UART is in that state, we die in an IRQ storm. */ | |
| 75 | #define ALPHA_KLUDGE_MCR (UART_MCR_OUT2) | |
| 76 | #else | |
| 77 | #define ALPHA_KLUDGE_MCR 0 | |
| 78 | #endif |