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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 | |
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 | unsigned long irqflags; |
29 | }; |
30 | |
31 | /* |
32 | * This replaces serial_uart_config in include/linux/serial.h |
33 | */ |
34 | struct 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 |
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