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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 */
20struct 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 long irqflags; /* request_irq flags */
26 unsigned int uartclk; /* UART clock rate */
27 void *private_data;
28 unsigned char regshift; /* register shift */
29 unsigned char iotype; /* UPIO_* */
30 unsigned char hub6;
31 upf_t flags; /* UPF_* flags */
32 unsigned int type; /* If UPF_FIXED_TYPE */
33 unsigned int (*serial_in)(struct uart_port *, int);
34 void (*serial_out)(struct uart_port *, int, int);
35 void (*set_termios)(struct uart_port *,
36 struct ktermios *new,
37 struct ktermios *old);
38 int (*handle_irq)(struct uart_port *);
39 void (*pm)(struct uart_port *, unsigned int state,
40 unsigned old);
41 void (*handle_break)(struct uart_port *);
42};
43
44/*
45 * Allocate 8250 platform device IDs. Nothing is implied by
46 * the numbering here, except for the legacy entry being -1.
47 */
48enum {
49 PLAT8250_DEV_LEGACY = -1,
50 PLAT8250_DEV_PLATFORM,
51 PLAT8250_DEV_PLATFORM1,
52 PLAT8250_DEV_PLATFORM2,
53 PLAT8250_DEV_FOURPORT,
54 PLAT8250_DEV_ACCENT,
55 PLAT8250_DEV_BOCA,
56 PLAT8250_DEV_EXAR_ST16C554,
57 PLAT8250_DEV_HUB6,
58 PLAT8250_DEV_AU1X00,
59 PLAT8250_DEV_SM501,
60};
61
62struct uart_8250_dma;
63
64/*
65 * This should be used by drivers which want to register
66 * their own 8250 ports without registering their own
67 * platform device. Using these will make your driver
68 * dependent on the 8250 driver.
69 */
70
71struct uart_8250_port {
72 struct uart_port port;
73 struct timer_list timer; /* "no irq" timer */
74 struct list_head list; /* ports on this IRQ */
75 unsigned short capabilities; /* port capabilities */
76 unsigned short bugs; /* port bugs */
77 unsigned int tx_loadsz; /* transmit fifo load size */
78 unsigned char acr;
79 unsigned char ier;
80 unsigned char lcr;
81 unsigned char mcr;
82 unsigned char mcr_mask; /* mask of user bits */
83 unsigned char mcr_force; /* mask of forced bits */
84 unsigned char cur_iotype; /* Running I/O type */
85
86 /*
87 * Some bits in registers are cleared on a read, so they must
88 * be saved whenever the register is read but the bits will not
89 * be immediately processed.
90 */
91#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
92 unsigned char lsr_saved_flags;
93#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
94 unsigned char msr_saved_flags;
95
96 struct uart_8250_dma *dma;
97
98 /* 8250 specific callbacks */
99 int (*dl_read)(struct uart_8250_port *);
100 void (*dl_write)(struct uart_8250_port *, int);
101};
102
103int serial8250_register_8250_port(struct uart_8250_port *);
104void serial8250_unregister_port(int line);
105void serial8250_suspend_port(int line);
106void serial8250_resume_port(int line);
107
108extern int early_serial_setup(struct uart_port *port);
109
110extern int serial8250_find_port(struct uart_port *p);
111extern int serial8250_find_port_for_earlycon(void);
112extern unsigned int serial8250_early_in(struct uart_port *port, int offset);
113extern void serial8250_early_out(struct uart_port *port, int offset, int value);
114extern int setup_early_serial8250_console(char *cmdline);
115extern void serial8250_do_set_termios(struct uart_port *port,
116 struct ktermios *termios, struct ktermios *old);
117extern void serial8250_do_pm(struct uart_port *port, unsigned int state,
118 unsigned int oldstate);
119extern int fsl8250_handle_irq(struct uart_port *port);
120int serial8250_handle_irq(struct uart_port *port, unsigned int iir);
121unsigned char serial8250_rx_chars(struct uart_8250_port *up, unsigned char lsr);
122void serial8250_tx_chars(struct uart_8250_port *up);
123unsigned int serial8250_modem_status(struct uart_8250_port *up);
124
125extern void serial8250_set_isa_configurator(void (*v)
126 (int port, struct uart_port *up,
127 unsigned short *capabilities));
128
129#endif