1 /*
2 * linux/include/linux/serial_8250.h
3 *
4 * Copyright (C) 2004 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11 #ifndef _LINUX_SERIAL_8250_H
12 #define _LINUX_SERIAL_8250_H
13
14 #include <linux/serial_core.h>
15 #include <linux/platform_device.h>
16
17 /*
18 * This is the platform device platform_data structure
19 */
20 struct plat_serial8250_port {
21 unsigned long iobase; /* io base address */
22 void __iomem *membase; /* ioremap cookie or NULL */
23 resource_size_t mapbase; /* resource base */
24 unsigned int irq; /* interrupt number */
25 unsigned int uartclk; /* UART clock rate */
26 void *private_data;
27 unsigned char regshift; /* register shift */
28 unsigned char iotype; /* UPIO_* */
29 unsigned char hub6;
30 upf_t flags; /* UPF_* flags */
31 };
32
33 /*
34 * Allocate 8250 platform device IDs. Nothing is implied by
35 * the numbering here, except for the legacy entry being -1.
36 */
37 enum {
38 PLAT8250_DEV_LEGACY = -1,
39 PLAT8250_DEV_PLATFORM,
40 PLAT8250_DEV_PLATFORM1,
41 PLAT8250_DEV_PLATFORM2,
42 PLAT8250_DEV_FOURPORT,
43 PLAT8250_DEV_ACCENT,
44 PLAT8250_DEV_BOCA,
45 PLAT8250_DEV_EXAR_ST16C554,
46 PLAT8250_DEV_HUB6,
47 PLAT8250_DEV_MCA,
48 PLAT8250_DEV_AU1X00,
49 };
50
51 /*
52 * This should be used by drivers which want to register
53 * their own 8250 ports without registering their own
54 * platform device. Using these will make your driver
55 * dependent on the 8250 driver.
56 */
57 struct uart_port;
58
59 int serial8250_register_port(struct uart_port *);
60 void serial8250_unregister_port(int line);
61 void serial8250_suspend_port(int line);
62 void serial8250_resume_port(int line);
63
64 extern int early_serial_setup(struct uart_port *port);
65
66 extern int serial8250_find_port(struct uart_port *p);
67 extern int serial8250_find_port_for_earlycon(void);
68 extern int setup_early_serial8250_console(char *cmdline);
69
70 #endif
71
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