2 * linux/include/linux/serial_8250.h
4 * Copyright (C) 2004 Russell King
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.
11 #ifndef _LINUX_SERIAL_8250_H
12 #define _LINUX_SERIAL_8250_H
14 #include <linux/serial_core.h>
15 #include <linux/platform_device.h>
18 * This is the platform device platform_data structure
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 long irqflags
; /* request_irq flags */
26 unsigned int uartclk
; /* UART clock rate */
28 unsigned char regshift
; /* register shift */
29 unsigned char iotype
; /* UPIO_* */
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
*,
37 struct ktermios
*old
);
38 int (*handle_irq
)(struct uart_port
*);
39 void (*pm
)(struct uart_port
*, unsigned int state
,
41 void (*handle_break
)(struct uart_port
*);
45 * Allocate 8250 platform device IDs. Nothing is implied by
46 * the numbering here, except for the legacy entry being -1.
49 PLAT8250_DEV_LEGACY
= -1,
50 PLAT8250_DEV_PLATFORM
,
51 PLAT8250_DEV_PLATFORM1
,
52 PLAT8250_DEV_PLATFORM2
,
53 PLAT8250_DEV_FOURPORT
,
56 PLAT8250_DEV_EXAR_ST16C554
,
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.
71 struct 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 */
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 */
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.
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
;
96 struct uart_8250_dma
*dma
;
98 /* 8250 specific callbacks */
99 int (*dl_read
)(struct uart_8250_port
*);
100 void (*dl_write
)(struct uart_8250_port
*, int);
103 int serial8250_register_8250_port(struct uart_8250_port
*);
104 void serial8250_unregister_port(int line
);
105 void serial8250_suspend_port(int line
);
106 void serial8250_resume_port(int line
);
108 extern int early_serial_setup(struct uart_port
*port
);
110 extern int serial8250_find_port(struct uart_port
*p
);
111 extern int serial8250_find_port_for_earlycon(void);
112 extern unsigned int serial8250_early_in(struct uart_port
*port
, int offset
);
113 extern void serial8250_early_out(struct uart_port
*port
, int offset
, int value
);
114 extern int setup_early_serial8250_console(char *cmdline
);
115 extern void serial8250_do_set_termios(struct uart_port
*port
,
116 struct ktermios
*termios
, struct ktermios
*old
);
117 extern void serial8250_do_pm(struct uart_port
*port
, unsigned int state
,
118 unsigned int oldstate
);
119 extern int fsl8250_handle_irq(struct uart_port
*port
);
120 int serial8250_handle_irq(struct uart_port
*port
, unsigned int iir
);
121 unsigned char serial8250_rx_chars(struct uart_8250_port
*up
, unsigned char lsr
);
122 void serial8250_tx_chars(struct uart_8250_port
*up
);
123 unsigned int serial8250_modem_status(struct uart_8250_port
*up
);
125 extern void serial8250_set_isa_configurator(void (*v
)
126 (int port
, struct uart_port
*up
,
127 unsigned short *capabilities
));